Good idea, Mart!
Due to the continuing antiques recession, all of the dealers I know about in northeast Missouri are gone. One of the best was in Palmyra, just north of Hannibal. I believe they're gone as well, but another dealer in the area might be able to get ahold of them. Very high end!
In the meantime, here's an auctioneer in Illinois, just east of St. Louis. Asselmeier and May. They hold monthly antiques auctions, and usually have good stuff: amantiqueauctions@gmail.com
Also, try Quincy, Illinois.