How many are in the set you have? Do they have a date or city where the casino was located? I think I know which set you are talking about but a little more information will help. If, it's the ones I think it is, the set consists of 3 strikes.
Blackjack, Dice and Royal Flush. The information I have is that the 4th strike, Slot Machine, was never released. The casino was located in Kansas City. These strikes are hard to find. I do know of several sets. I think you'd do well selling them on ebay. I'm embarassed to tell how much I paid for them. Hope this helps.