I have a model 64 probably from the late 60's or early 70's. Unlike my 54, it does not have the year of mfg. It has what for all purposes is a non-adjustable trigger. The only model listed on the barrel is "Lightweight." Does anyone have a source for used triggers that might fit this one? I'm not looking for a competition trigger, but at least something crisp in the 1-3 pound range. I tried Neil Johnson, but he didn't have anything used. I really don't want to spend the $160 with Champion's for a 5098, so any help will be appreciated.