Hi. New member here. I have a few Marlin rifles, including an 1894 in .357 Mag (1980), a 39A Mountie (1962), a Camp Carbine 9mm (unsure of year, 4-digit s/n preceded by a bunch of zeroes), and two Camp Carbine .45's. Most of the guns are great shooters. One of the .45's needs a barrel replaced. Hope to receive some advice on locating a barrel.