You can make your own. For free.
First, do a bunch of screen captures or steal the ones that others have posted. Maybe take a look at the screencapture forum here.
Then, register at
http://www.webshots.com and create a photo album.
Upload the screen shots into your photo album.
Download the webshots screensaver and indicate your photo album as the photos to use. You can always check/uncheck whatever photos you don't want to use.
