Building my own gun

Here's an idea. Look at the MK1 and MK2 Airsporter stocks. The came out in 1948. See how the wood was glued up?

Also, you might find a local guy with a portable sawmill. That has some wood stashed away. Or some sell wood rough cut. etc. I've seen them advertise on Craigslist before. Go on CL and search "all categories" for walnut lumber. Sellers of "live edge" lumber are popular results. You don't want any sapwood! Live edge has sapwood. Try to get quarter sawn. They don't even have to be local. Lumber can be shipped! These are small businessmen. 

Good luck!