Buttstock may be interchangeable with GR2/GR3, 425/426, etc. Cole will know, and usually has wood. I bought two sets of wood from them a few years ago, one PG/one straight. Fully interchangeable between my GR3 & 425. Jeff's Outfitters had some Beretta SxS wood a while ago; worth a call. If you need a forend to match, there were differences in the release mechanism between the earlier and later guns.
If you find a factory finished buttstock that will fit, consider easing the edge of the wood on those little ears that fit up behind the top of the frame. If it's too tight, recoil can pop a sliver of wood off the surface. Been there, done that.
Last edited by Replacement; 02/24/07 12:09 PM.