From information I got from the stock's prior owner, I think both the barrel and lock are still around. The antique stock had a modern ramrod [too large for pipes] tightly stuck in stock, so I think the pistol was "complete" until rather recently. I was able to wiggle the oversized ramrod out without damaging pipes or stock...but it was stuck so tightly that it might have been part of the reason the working parts were removed...I'm guessing they were restocked onto a new stock that the owner could shoot.
I have made a significant standing offer for both barrel and lock, "if they ever become available." I'm hoping the money offer might make them less "unavailable." To add fuel to the fire, the seller recalled that the barrel was signed, and had two names, both with a first initial, somewhat in Tennessee fashion...maker and owner...which is where I think the pistol most likely came from. It was originally found in northern Indiana at an estate sale...but its life since then is "fuzzy." Shelby Gallien