There are some that show up sometimes, but it's rare. I have no idea how they do it. The ones I'm thinking of were all done by the same fellow I believe.
ETA: The pictures are too large to post, but heres one: http://vapeporn.com/wp-content/uploa...01-800x600.jpg
I have also seen pictures of a green one and a blue one.
I've often wondered if you bought a ProVari and asked ProVape if they would send you just the casing, which you could have coated and then sent back for assembly, if they would go for it.