Rich, it is kind of my lucky day. Thanks for the Marstar tip.
When I went to dissasemble one of them, I discovered that the front plate and the little button are missing. The screw-on barrel nut is there and held with a home-made button. Luckily, I have another pistol so I can tell what is not right or missing.
The Marstar website lists 42 different parts for the Stop, so might well have what you need. If not, Heller Arms would be my next stop. Someone here should have Tom's e-mail address for you. As a last resort, Numrich Arms (Gun Parts Corp) carries some Frommer parts, if I recall correctly. Good Luck with your repairs. I hate those nasty surprises myself...
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