Here is a site that I found that contains alot of different races. Click on each race and they have multiple pics of each car that ran in it. While most of the cars are not available in 1/10 bodies, they have paint schemes that can be laid on most any USGT body we have. So, if you have been trying to come up with a fresh scheme this site has plenty.
http://www.racingsportscars.com/photo_natgt.html