Looking for skin creation resources

I'm working on making some marble statue skins for a friend. I already have the base textures, so that's not an issue. I was wondering if there are any sites out there that might have layers for basic anatomy, light and shadow that I can overlay on the skins I already have to make them more realistic. I'm not above paying s few L to get them, but most skin creation PSD kits are going to come with 90% things I don't need.

Have you tried the Eloh skins? I've never played around with them but hear they're an amazing resource...

http://eloheliot.blogspot.com/2007/12/my-psds-let-me-show-u-them.html

also try http://sezmra.com/?page_id=7

No, I have not, but I will now! Thank you.