Try Savage, egunparts, garage sale, want ad, for sale ad, Shotgun News, estate sale, gun show , pawn shop, gun shop
Search for Macon Gunstocks
I have a used "riot" 520-30 butt stock.
Start with Kreighoff International through their website.
Have you heard about the internet? Start with google Search for Savage 220 A stock then click
Try e-gunparts.com or MidWest Gun Works.
I have one for sale. Message me @ garym6@cox.net
ebay, gunbroker, Brownells, Midwest gun works - all on line
Try this link: http://www.gun-parts.com/savagestocks/
Precision Gun Works had them. Send them an email to check on availability.
LONG out of production, the company is no more. You may find a used stock at gunpartscorp, but you would need a match to the correct model- there were dozens.
Type your answer here... Remove the two screws on the butt and you will find a single screw inside that holds the stock on. Remove the screw and the stock can be removed revealing serial number on top.
Blue Book of Gun Values