Nick,
Here is a start and I'll get the rest up soon. What I've posted are some of the overlays I used when making the textures. There is a simple overlay and then a specular map too. They all come from an original and larger map I found at a site that I should just link to except that it is one of those with the damned little pop-up adds. Whoever wrote the script screwed up and it often has runtime errors that crash the browser.
Here is my link:
3D Constructs
Here is where the
source image is, if you have problems I can post the original.