Derek - Are you producing a single coin or multiple coins with different metals SE, LE, ELE, XLE, etc, etc?
It would be nice to know what the metal will be or metals if there will be more than one coin.
We got some made a while back through an outfit called pokerchips.com They are official weight clay chips with the custom printed inlay on both sides. I we had our team logo (see avatar) and the gc logo on the other side (need to get approval first from Groundspeak) I beleive the minimum is 500 pieces. I haven't had any problem with them. We are very happy with them I have a few of hundred left. I would go back to them again.
Good luck!