Humby-
There are also several places on the internet that do this. I think the process is called photogenesis/hydrographics. Here is a website that does it for you but you have to send them the pieces you want done.
http://www.exoticwooddash.com/coating.htm
However, I remember seeing a website that would do it which didn't require you to send your pieces in; they had the pieces in stock and you just sent them your pieces after they sent you the new ones.
I hope this helps...