I would try Numrich gun parts corp.They may be found on the web.
An electric blower with the parts breakdown at:
Try gun shops, pawn shops, gun shows, e-gunparts.com
Just about any economy single-shot shotgun, including yours, would top out at $100.
I believe it is made by Marlin model 57M also the Enfield 57M is the same gun as well, at least this is what my research is showing. Mine is a 22 mag and I am very happy with it, it works fine just like a Marlin.
parts of a machine that are identical parts that you can change and it still work fine
Weaver N series, N2 being the lowest height and N5 being the highest for bolt clearance. N2 is most common and should be fine for most variations of the 101.16s.
A fine revolver.
1987-1988 is the only years i know that will interchange. i have a 1988 KDX 200 with a 1985 model engine and it runs just fine. I do have a 1988 engine for parts if you need something
There are several types of gun stores that sell parts for different types of shotguns including models by Western Field. There are also online retailers like Amazon that sell these parts.
1954 and 55 only a few were produced, beginning to see some value as a collector and a fine gun lately if you own one i would avise not shoot it and if you do only lead shells
A fine pistol.