Hi Mark,
I just took a look at an old post on Rimfirecemtral from 2005, these two possibilities were mentioned. With any luck they might still be out there. Good luck
Bob
Butch Hongisto (573) 468-3234
Outback Guns
2110 McLean Avenue
New Albany , IN 47150
ph 812-945-0480
James Pappas made a few on a CNC and Black annodized that looked great ! I used one on a "E " I rebuilt ! Jessica sold some on E bay for about $75! Check with her at Pappas Rimfire Products !