I know there are a few floating around...
Halter91 is one of the mods at redskin-roadtrips.com, and I know there is a thread there with one that was created by SkinzFan007 at extremeskins.com...direct link to the wallpaper below (1280x1024, other sizes linked at redskin-roadtrips.com).
http://www.undergroundart.us/forum/u...1196135194.jpg