I have a bit of hiatus as well, built maybe 9 rifles & pistols 1962 - 1970's. Seems to me muzzle loading builders supply has the best assortment of hardware & are pleasant to deal with concerning barrels.
Deal with TOW &, of course, Dixie, too.
There is a wonderful Brooks tutorial somewhere on this site, which I recently downloaded & carefully hid in the depths of my computer. Good reminder of what you should have known + more.