I was just looking at the shadermappro website and noticed that they mentioned that some of the textures they were converting to 3d were from freeseamlesstextures.com. I went there and they have some textures that look like they might be useful. They also had links to other useful texture and picture resources: http://freeseamlesstextures.com/text...rces/index.htm

Texture Warehouse listed there looked interesting too.