Here's a scan of my Sisk samples for reference, Barry. Includes all but the two oversize I posted earlier. I think you need about 8 more.

Got mine as salesman's sets from the Paul-son retail store 10-15 years ago. I used to have extra sets but they have all been traded or sold over the years. If you post the ones you need, some collector may have extras you can get. And I occasionally see singles for sale on ebay.

I got the $20 only a couple of years ago and don't think I've seen another.

I assume your gold 50th anniversary was glued to a display, as mine was. At least that's what Armin told me when he made me buy this one, saying 'take it until you find a better one'; I never did!

Sisk chips were sold outside Nevada, I believe. The C.J. is likely from Christy and Jones. I never heard where the Sisk came from; probably just made up.

Good Luck!