Sql-server – Manually create index fragmentation

Does anybody have a good approach to manually create a specific fragmentation to an index, ideally without increasing the number of rows in the underlying table?
I need this for the purpose of a index rebuild benchmark. In order to measure the time required for specifig fragmentation rates of the same table / index, I have to re-create specific fragmentation levels I want to try.

It's very time consuming and difficult to create this fragmentation with some more or less ramdom table updates. Any ideas?

UPDATE:
This is my test table. It actually has about 540K rows,

USE [Test]
GO

/****** Object:  Table [dbo].[tFrag2]    Script Date: 12/22/2015 15:33:51 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

SET ANSI_PADDING ON
GO

CREATE TABLE [dbo].[tFrag2](
    [a] [int] NULL,
    [b] [varchar](1000) COLLATE Latin1_General_CI_AS NULL,
    [c] [varchar](1000) COLLATE Latin1_General_CI_AS NULL,
    [d] [decimal](18, 0) NULL,
    [e] [int] NULL,
    [uid] [uniqueidentifier] NOT NULL,
    [dt1] [datetime] NULL,
    [dt2] [datetime] NULL,
    [dt3] [datetime] NULL,
    [dt4] [datetime] NULL,
    [dt5] [datetime] NULL,
    [dt6] [datetime] NULL,
    [dt7] [datetime] NULL,
    [dt8] [datetime] NULL,
    [dt9] [datetime] NULL,
    [nv1] [nvarchar](4000) COLLATE Latin1_General_CI_AS NULL,
    [nv2] [nvarchar](4000) COLLATE Latin1_General_CI_AS NULL,
    [nv8] [nvarchar](4000) COLLATE Latin1_General_CI_AS NULL,
    [nv3] [nvarchar](4000) COLLATE Latin1_General_CI_AS NULL,
    [nv4] [nvarchar](4000) COLLATE Latin1_General_CI_AS NULL,
    [nv5] [nvarchar](4000) COLLATE Latin1_General_CI_AS NULL,
    [nv6] [nvarchar](4000) COLLATE Latin1_General_CI_AS NULL,
    [nv7] [nvarchar](4000) COLLATE Latin1_General_CI_AS NULL,
    [lfd] [int] IDENTITY(1,1) NOT NULL,
 CONSTRAINT [PK_tFrag2] PRIMARY KEY CLUSTERED 
(
    [uid] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

SET ANSI_PADDING OFF
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_a]  DEFAULT ((123123)) FOR [a]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_b]  DEFAULT ('ccccccccccccccccccc4444444444444444444444444') FOR [b]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_c]  DEFAULT ('ffffffffffffffffffffffffffffffffffffffffffffffff') FOR [c]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_d]  DEFAULT ((7)) FOR [d]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_e]  DEFAULT ((777)) FOR [e]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag_uid2]  DEFAULT (newid()) FOR [uid]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_dt1]  DEFAULT (getdate()) FOR [dt1]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_dt2]  DEFAULT (getdate()) FOR [dt2]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_dt3]  DEFAULT (getdate()) FOR [dt3]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_dt4]  DEFAULT (getdate()) FOR [dt4]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_dt5]  DEFAULT (getdate()) FOR [dt5]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_dt6]  DEFAULT (getdate()) FOR [dt6]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_dt7]  DEFAULT (getdate()) FOR [dt7]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_dt8]  DEFAULT (getdate()) FOR [dt8]
GO

ALTER TABLE [dbo].[tFrag2] ADD  CONSTRAINT [DF_tFrag2_dt9]  DEFAULT (getdate()) FOR [dt9]
GO

ALTER TABLE [dbo].[tFrag2] ADD  DEFAULT ('xxxxxxxxxxxxxxxxxxxx') FOR [nv1]
GO

ALTER TABLE [dbo].[tFrag2] ADD  DEFAULT ('xxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyxx') FOR [nv2]
GO

ALTER TABLE [dbo].[tFrag2] ADD  DEFAULT ('xxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyxx') FOR [nv8]
GO

ALTER TABLE [dbo].[tFrag2] ADD  DEFAULT ('xxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyxx') FOR [nv3]
GO

ALTER TABLE [dbo].[tFrag2] ADD  DEFAULT ('xxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyxx') FOR [nv4]
GO

ALTER TABLE [dbo].[tFrag2] ADD  DEFAULT ('xxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyxx') FOR [nv5]
GO

ALTER TABLE [dbo].[tFrag2] ADD  DEFAULT ('xxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyxx') FOR [nv6]
GO

ALTER TABLE [dbo].[tFrag2] ADD  DEFAULT ('xxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyxx') FOR [nv7]
GO