I love the tortoise pipe stem. Is there a source for those or only through a guy like george?
Dunhill once offered tortoise as its super-duper-extra-ultra-luxury stem option, many times more expensive than even ivory or amber, never mind "common" materials like horn or ebonite, but it has been illegal to harvest, trade in, or anything else for a long time. As in, get-visited-by-guys-with-guns-if-you-try illegal.
There are two kinds of decent synthetic tortoise available for pipe stems, though. One is available semi-molded (meaning it still requires significant shaping and fitting), while the other is strictly rod stock. Quite difficult to work with, but the fancier/better looking of the two. (It's what was used for this Baldi)
As for me being a source for the material, I'm not. I just fabricate it. The supplies I use come (mostly) from either Steve Norse or Tim West.