Using master pages with normal Pages documents in Pages 7.0

What about looking for files with the pages extension (.pages) in spotlight?

Open spotlight (keyboard shortcut: Command + Spacebar ) and type: .pages

If you see a file popping up, hold Command an click on it. The file's location will then be opened in finder.

Nice work you almost got it. I would suggest looking at the properties instead of the data ;)

tell application "Pages"
    tell front document
        repeat with pg in pages
            tell pg
                set im to images
                repeat with i in im
                    tell i
                        get properties
                    end tell
                end repeat
            end tell
        end repeat
    end tell
end tell