Can anyone help me with a needed part for an old JC Higgins model 20 12 gauge shotgun? This is the same model as the High Standard model 200. I need the cartridge cutoff lever assembly, the shorter of the two. I have tried the internet and not found anyone who can supply this part (Widners, Gun Parts, etc) Surely someone has a junker or a parts box with one of these in it? Any leads will be appreciated. Thanks, guys.