Try e-gunparts.com
stevens bolt action 22 model 840
You can find most of the parts at e-gunparts, to find them do a google search of "e-gunparts".
Try Gun Parts Corp (Numrich) or Jack First.
J Stevens Arms Company has been making rifles since the 1890s. There are dozens of different models of Stevens bolt action .22s. If you repost with all markings on your rifle, we make be able to narrow it down a bit. sorry-
Savage/Stevens.
Your gun is a Savage/Stevens Model 86. gunpartscorp.com has some parts. After that it is a long search.
Try Gun Parts Corp. They have a web site
I would try www.e-gunparts.com they have tons of parts for sale at good prices most of the time.
If your Stevens is a bolt action, it is NOT a visible loader. If it has any part (perhaps the barrel) that is marked as a visible loader, that part has been replaced.
Stevens bolt-action with a cylinder.... What are all the markings on the gun? sales@countrygunsmith.net
The stevens model 15 was made from 1936 until 1971.