The stock I bought looks identical to this:
http://www.riflestock.com/store/do/product/SGS/01-01-42
Beretta actually supplied this Choate stock with 1201FP's.
Just call Choate and ask. Hopefully, they still have some. I find it works pretty well, and I normally prefer standard sporting-style stocks on shotguns.
I run it without any of the spacers, as I wanted to shorten up the shotgun...