Looking for butt stock for Ithaca Model 37 20 gauge pump

[MD]

I have a 20 gauge featherweight Ithaca pump shotgun with a very short stock a previous owner cut down for his small framed wife.

A buddy showed me his version of the same gun last night with full length stock. It is very nice and fits me way better. Where would I even start looking for a butt stock for one of these guns? I'm not sure what the manufacture dates were for these guns. I think mine is late 60s or early 70s production though I could be wrong.

 

[k32]

Ithaca model 37 stock

Google Ron Sharp in Dunnville On. He was at the Ithaca plant when it was in Dunnville. I think he ended up with the remaining stock.