Good morning all. I have been the owner operator of a small firearms restoration business in Tennessee for 30 years and have hit a very difficult road block for me. I received a stick of rust a few weeks back which turned out to be a very old 36 caliber rifle. It has a 44" barrel straight 7/8" octagon I am attaching a picture of the lock in hopes someone may be able to help. It will need a complete stock so I need a starting place. Thank you all in advance.