Guys, I would like to point out that there are two TVM's. One is Jack Garner's Tennessee Valley Manufacturing and the other is Matt Avance's Tennessee Valley Muzzleloading. Both are reputable companies that offer very similar products. I know that Jack's fowler kits offer octagon to round barrels, maple or walnut stocks, simple trigger, sights, touch hole liner, barrel lugs (two solder on), steel or brass furniture, L&R Queen Ann lock (or you can specify a Chamber's lock), you can get the English style fowler butt plate and guard or the Virginia butt plate and guard to make a smooth rifle. I am not sure what Matt offer's but I think it would be similar to what Jack offer's.
Jack has his barrels fully inlet except for the tang, he will inlet the lock and trigger if you want him to. He will rough shape the butt stock and leave the forearm square if you want, I have him cut the ram rod groove but not milled to the breech so I can drill my own. Jack is good to work with and will fix your kit up just about any way to want.
I think either one of these companies would to you right.