Ellwood Epps had a-bolt magazines last I checked. 75$ iirc
I wouldn’t Frankenstein a mag system, buy another and tie a string on it. Maybe a rope is in order here.
Good for you mate!! Now you go back in the mountain with you Subaru!!
Now do what they used to do with Lee Enfields and chain it to the friggin' rifle.
Buy two. I hate DBM’s