Probably should also be in the classified section but I just thought about it now. See my post #13.
I have a 20 gauge flintlock fowler by Matt Avance of Tennessee Valley Muzzleloading that I no longer use. Nothing wrong with the gun; I am not able to hunt the uplands with my back the way it is. The gun is available. (My other fowler in 16 gauge I am keeping.)
Interested? Let me know here and by PM.
Pete
Info and pics from TVM. Ignore the $.
https://www.tvmnatchez.com/fowler