I'm the newsletter editor, and unofficial archivist for the SABR Minor Leagues committee. As part of the "archiving", I compile links to minor league team photos, including several that have been posted in this thread.
So, if anyone gets bored and is looking for a team photo to work on, you'll probably find something available on the list.
https://docs.google.com/spreadsheets...it?gid=0#gid=0