Bill Judge has listed some on ebay, and they're probably still available on David's site . Are you familiar with the story of the Sal Sagev chips? Gene T. is the one who tracked them down (the man is like a bloodhound! ).

http://www.marlowcasinochips.com/links/genetrimble/salsagev/salsagev.htm

(The Mission Bar ashtray and matchbook are not ours ; The postcard and swizzle stick are ours )