If you have the plasic molding facilities, why not mold some fake wood stocks of old WW2 rifles that a VSR-10 (or simular) action can just drop into? Then people into that era arn't searching forever for a gun and paying huge amounts. Instead they are paying you for a kit instead.
I've been thinking of doing the same but carved from real wood. However, I don't have the money to get a rifle to test fit the stocks on.