There's not as many textures resources arounds is there? Abuse has the right idea. :) There are textures at www.3dkingdom.org but only a few and they're not brilliant.
I bought a 3d developers cd for ?-99 a while ago. Amongst other things it had a textures sections - hundreds of them, and royalty free too! I've seen similar cd's advertised on the Internet. I think it's a small price to pay as you get far more than you'd ever need!...