What about Numrich? Or I suppose that if someone would make an accurate drawing of theirs with measurements, a machinist could turn you one out on the lathe? Not like it has to be special or a certain steel like a barrel or cylinder. Or being on a rimfire, not a high stress part. One thing that bothers me is I have one of those topbreak prewar H&R .22 Specials that needs work. Blueing excellent, bore mint. Perfect Roper grips. but some chump went to work on it, filed on the rear sight and hammer, and butchered up the extractor star so the ratchets look like a mess. Saw another with the good parts but a bulged barrel, and the bozo would not go less than 160 for it, he claimed the obviously bulged barrel was just fine...So mine is collecting dust.