An excellent site I recently found, Disneygeek.com, has a "by request" section. There are pictures of the entire Fantasmic show, all the small and large signs in Fantasyland (including temporary signs), all the lampposts in both DCA and Disneyland, and the following, which is the most complete catalog of shop windows I've seen.
For all the windows on the East (Tomorrowland) side, click here: http://www.disneygeek.com/by_request...d_windows_east
For all the windows on the West (Adventureland) side, click here: http://www.disneygeek.com/by_request...d_windows_west
This site is worth checking out beyond these two areas as well.