I'm a texture fiend, I'll admit it!
I've started to make them for sharing and they can be found on my Flickr account, here. More will be added as they are created.
Let me know what you think.
PS: Due to size restrictions or something, the textures are not showing up at full size. If you would like to have the 3000 x 2400 version of the textures, please leave a comment here or on Flickr.