Walt, I was just a young pup back then but as I recall a Sporting goods dealer in Chicago was one of the people who you could go through. Stopeger rings a bell but I do not think that was the right name. A few here are older than I am and should be able to give you the right answer. There were adds in American Rifleman for these barrels. Also there were the ACME marked barrels that were a little later. You see a few Parkers with ACME barrels.