This is what I was talking about:
http://www.gunbroker.com/item/565054316In at low bucks, if you decide the 20 ain't your thing (hey, it happens) out at low bucks. The Falcons are 3" chamber, disc set striker, hidden third fastener, double trigger, non-ejector ammunition eating and bird killing machines. They haven't caught on yet, here, about 40 years after they were produced.
Cole Haugh will set you up with a spare set of strikers, and the tool to put them in. You should be set to go for a long time at that point.
Best,
Ted