1938 to 1965
the savage model 220 shotguns were made from 1937-1945 with 50,000 being made.
Depending on condition, around $150
was probably made between 1942 and 1950
Depends on what it is choked.
I would start my search at numrich gun parts corp.they can be found on the web.
About 60 years ago, storing one right now for my grandfather who just told me the story about it.
Have you heard about the internet? Start with google Search for Savage 220 A stock then click
Blue Book of Gun Values
Savage guns were manufactured in Chicopee Falls from 1946 to 1960. A 410 single shot could bring from $75 to $150.