Re: Lyman Smooth Bore
Investarms made some smoothbore barrels for it's Hawken style guns. They also make the Lyman guns. I have never checked to see if the smooth bore barrel would fit the stalker. May well fit. I have one of the smooth bore barrels that I picked up at Dixon's 20 years ago when he had a bunch of Lyman and Investarms parts/seconds on hand.
It doesn't cost much to have Bob Hoyt bore out a compatible barrel to smooth.