If you like to hunt for possible bargains check ebay.com
If you don't want to mess around go to www.havlinsales.com
Both Auctionarms.com and gunbroker.com might be a source, check the parts forum. God Bless, Frank.
If you have a magazine, go to walmart and check out a savage 93 magazine
I have seen on the web the 93 magazine fits the mossberg 22 mag and also the 17 round also.
Nice part is the are 11.96 with the internet walmart order number.