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 The awesome guys behind demilked.com has put together one hell of a texture pack for us all. All from plain paper to torned, stained, sheet paper, graph and everything in between. I'm pretty sure that this collection will satisfy your quest for paper textures completely.  check them out

13 seamless Denim Jeans Textures by fuzzimo.com. Each texture comes in three sizes:
600x600px, 500x500px and 400x400px.
The zip file includes the seamless pattern images plus an html file to see how they look when tiled.

Download them here (4mb zip)