The only ones I ever saw were a 100 piece set of various denomintations that were auctioned off on ebay as part of a charity event. The chips were donated by their prop department, so I knew they were legit. I was going to buy the set and break it up and sell/trade. I bid $300 - someone out bid me. I have never seen the chips from this auction surface, so I guess someone is using them as a home set or just wants to keep them together.

I will try and get some if another set is auctioned....