Our friend Mike Spinetti in Las Vegas sells chips like that finnetti@aol.com and he has a web site http://ws.goos.com/~casinochips/

There are always new chips for sale on ebay in the casino chip catagory http://listings.ebay.com/aw/plistings/list/category899/index.html

One eBay seller, who I don't know, always has many lots going, look for a "HOT, Check It Out" icon.