There is a company that is making reproduction Hopkins & Allen underhammers, they make a .36, the price is , or was a few months ago, $250, with 2 lbs of balls or conical bullets, plus shipping.
I have a H&A from the '60's,it is a .36 and does very well for small game, with my home made hollow base conicals ,I get less than 3/4x3/4" at 25 yds with open sights and my poor eyes.
Just search for "underhammer rifles".
Don
