Attached Link: http://textures.forrest.cz/

You should be able to find just about any texture here. Also, you can make your own jpg or gif texture with this freeware program. http://www.sausage.com/supertoolz/reptile2.html Also, use additional channels to put a shiney or dull dusty texture over the one you have, with some bump, for that 'used' look.