Nothing real about them actually. I know you found those on Revlovers, but they actually came from a site of rendered CG models. I didn't want to register - it was a pay site, and rather expensive - but I recall these were part of an extensive tutorial. I'll try to find the original website over the next few days.
Here are the originals - non-Revlover-sized. At this resolution it's a bit easier to tell that they couldn't possibly be real:
>8^)
ER