Your best chance at finding parts for this .22cal single shot is Numrich gun parts corp.They may be found on the web.
Try a want ad or a gun show.
Depending on which parts, they may need to be made.
Try e-gunparts.com
Made by Savage. We have parts. gunshop@nctv.com
Try e.gunparts.com
Numrich gun parts
Repost with the model number, and we may be able to give you an answer.
Basically a Marlin Model 100. I have parts. sales@countrygunsmith.net
I would start with numrich arms,they have an awful lot of old gun parts.
You might find what you need at webdept@gunpartscorp.com .
http://www.e-gunparts.com
Numrich Arms (GUNPARTSCORP.COM) lists several parts for the Stevens mod 94 in different gauges, depending on the exact model.