I got one from Sarco a few months back. They were not listed in their regular advertising sheet, but a phone call found me one.
If you find one, don't think you have to get the new bushing and link, you may not. Mine worked fine with the existing parts, in fact, the new bushing I bought was too big for the 9mm barrel. The standard x25 mags work fine in mine as well.
Keep looking until you find the 9mm barrel. It is really nice to be able to shoot either ammo. It is like having two guns for the price of one.