I got mine done by Old West Poker Supply. 2" ceramic blanks. The artwork I had done by my contact in Europe. I'm sure he'll give you a good price if you want something customized. Not sure if OWPS does any customization or not, I think you have to send them the files, but I could be wrong.
OldWestPokerSupplies.com Offers -
I can PM my artwork contact to you as well if you like