Try http://www.williamsgunsight.com/and click on the Used Guns and then Black Powder link. They had 2 percussion TC with double triggers 50 cal about 3 or 4 weeks ago. I called them about both rifles, but there was both percussion and not FL, which is what I was interested in. I just check and they lowered the price on one to $119.
Chap Gleason VA