The JC Higgins Model 20 pump shotgun is a High Standard Flite King. SOME parts may be available from gunpartscorp.com, from gunsmiths and at gun shows.
Try e-gunparts.com
50-200 US Dollars
The JCHiggins 20-12 model number 583 was manufactured in 2001. J.C. Higgins was a brand associated with Sears, and the model number indicates it was produced during that time frame. If you have specific questions about the bike or its features, feel free to ask!
I would start my search at Numrich Gun Parts Corp. They may be found on the web as gunpartscorp.com. Your JC Higgins 583.3 is likely a High Standard, possibly a model 514. Numrich has parts.
Best left to a gunsmith
looking for stock model sb 20 gauge
Most of these were made for Sears by the High Standard company, and was sold by them as the Flite King. Not a lot of collector interest, but a sound, durable hunting grade pump shotgun. Depending on condition, value is $100- $175.
I have parts for that model. sales@countrygunsmith.net
Nobel model 20 is the same gun for parts.
We have them. gunshop@nctv.com
I have quite a few. sales@countrygunsmith.net
try this-------http://www.e-gunparts.com/--I know they have parts--Vail