So where are those signle shots today Rabbit, by your account there must be many. I've been to farm auctions, rural VFW gunshows - can't recall seeing any in the rustic heartland.
The St. Louis Hardware store's single shots went west to lighten the load. The good ol'boys round here(you know, the ones that put meat on your table) made enough for the likes of the Sterlingworth.
Better look to the wild west for these no-name single shots.