[markpixs]

Likely have to keep an eye on gunbroker.com, here's a listing for one but a ba-a-a-a-d photo.

www.gunbroker.com/Auction/ViewItem.asp?Item=102431307

Wisner's doesn't list them but have the part number in the exploded drawing.
Could try Jack First, www.jackfirstgun.com , no online catalog.
Poppert's might but don't list them in the online cafalog, may be worth a call.
www.poppertsgunparts.com

Then there's Numrich and the rest of the regular parts folks.

 

[markpixs]

Every so often eBay will come thru for gun owners. I don't check there as often as I should.