were on the tables for only a short while in 1999, when the casino changed the chip designs. you can view them on Greg's Chipguide page: http://www.chipguide.com/cgi-bin/search/search.cgi?id=nmacsc

I would suppose that they're pretty hard to find since they were so short-lived. I haven't seen any for sale on eBay, as I remember.

Dave