I have an opportunity to purchase a 39a, lates 1960s model. The rear stock has a quarter size crack/ separation in the wood. Will any 39a stock wood fit it, meaning any decade era of the model 39a? I would like to replace both the front hand guard and the buttock together, do the wood matches. I can get the rifle for a good price as it sits, but not sure how easy it would be to find the wood for it and price.