Got my SS G2 rifle frame from Oakland Guns in AR. Bought an MGM .44 barrel and a TC .22 LR Match barrel from Haus of Arms. They have lots of accessories, but some of the stocks they have look a but wild and/or clunky to my taste. They also have TC factory wood.
MGM and some others will make the barrel of your dreams for $400-$500 bucks, and Gunbroker has scads of new and used ones. Prices are all over. Figure approx. $400 for a rifle frame with stock and forend. Blued & walnut .30/30s are $650 or so on GB too, if you think you might be getting a deer barrel someday.