Have you tried the Walther's online website? They may have what you are looking for...I would be surprised if they didn't have one.
Greg
PSC has a separate price list catalog. As far as fitment, if you know how big the opening is in the smoke box, you could call and ask. It is likely that you may have to do some modifications to make a PSC one fit.They have a bunch bur how do I tell which fits my model? Also the page does not have prices