I would recommend ABC Gifts and Awards for ceramic chips; they have some stock designs that are available, but for the more adventurous, you can submit your own custom designs and they will do them up for you. That's the way I went with my custom ceramics, and Gene at ABC was absolutely WONDERFUL to work with. Very good communication and superb craftsmanship, delivered in a timely manner, at a reasonable price.
I understand that Epokerdeals is also very good, too.
Just my 2 cents...