Welcome to the forum...from SE Texas. Interesting Marlin customized model 39. You could start your restoration by finding a set of used Marlin walnut stocks? A stock set will cost you about $175 to $200 ......They will probably slide onto your rifle easily with only a minor amount of careful sanding.......then later you could try and get the tube magazine and inner tube follower to restore it to a repeater.
There is a famous gun nut by the name of Harlow Parkerinfarker who did this work, the hose clamp was a dead give away, google the name maybe he could work on it again. good luck, I had a colt he did---------