Mike Kokolus made replacement, exact copies, of rifle stocks. I paid $300.00 for my Gustlof Werke .22 KKW stock years ago. Well worth it. Since he passed, the business is called CRS (Custom Rifle Stocks). Aaronsburg, PA. gunstockdupicating.comThe Imperial proofs, letter under a crown, were in use to 1940, then the eagle proof.