They are starting up operations once again (per NRA Rifleman mag). I'd google around and see what you can find out. They said they would provide support on most rifles (except two models). If I could find the mag I'd share, but itshiding from me right now!
I've owned one for quite a few years. I converted it to take a 209 primer. Mine shoots well with 100 Grains of Pyrodex behind a 240 grain xtp bullet and sabot.
I've got one, great gun. Used it for shotgun/muzzleloader season ever since it can out as a new gun. I use 100 Grains of Pyrodex pillets and barnes xpb 250 gr bullet with a musket cap. I shoot it a inch high at 100 yrds. Has never failed me yet. Simple to clean too.