I have a few Par-A-Dice plus Silver Eagle and Casino Queen cards listed on my trading website
http://www.slotcardtrader.com/rarer-cards.htm

Prices under cards are catalog values, I'm willing to trade or deal.

I have a box with about 400 more rarer doubles I haven't sorted yet so I'll have to see if there's anything there when I get time to add them to the website. I acquired Dennis McCormack's collection back in May and still have about 10,000 - 20,000 more slot cards to go through.

I know you're looking for IL riverboats but there's several hundred rarer cards listed currently on my website from all over. Cards are listed alphabetically by casino name.