I have a 390 stock that I'd sell but it's not a trap stock. It's a field stock. 390s and 391s buttstocks will interchange. You would have to add to the comb to get the right heigth, but you will probably have to do that anyway unless it's a reduced length parallel comb stock. I'll sell it for $50 shipped. The stock is brand new. If you're interested, I can get you some pictures.