Attached Link: Denim Texture.

It's a denim-like texture I created entirely in Photoshop. No photos used. Hopefully you can use it. It's a zip with a 2048x2048 PNG file of the diffuse texture.  I've included a quick pic to show how it applied to a pair of shorts I'm making. Keep in mind the stitching and wrinkle detail is from a normal map that's specific to the shorts and so, not part of the texture. Try it on your own clothing.