Try the auction sites, ebay, e-gunpart.com, do a web search.
Savage 325c rear peep?
The Stevens Model 66-B, a single-shot .22 caliber rifle, did not originally come with a peep sight. Instead, it typically featured standard open iron sights. However, many owners added aftermarket peep sights for improved accuracy and targeting. Always consult specific model documentation or collectors for detailed configurations.
Should be a Stevens rifle, but the peep sight would probably be aftermarket. If you can send a digital picture of the rifle and a closeup of the sight we can probably ID it for you. sales@countrygunsmith.net
Try Bob's Gun Shop... http://www.gun-parts.com/savagerifle/ I have not orderded any parts yet from them, but they seem to have quite a selection of parts for the savage and springfield Stevens rifles. I recently was handed a model 56 less the peep site, buck horn and 5 round clip. The gun's not worth much, but it seems like a fun project.
Lyman
www.e-gunparts.com
Try e-gunsparts.com
Model 80 1934 to 1939 Model 80-E 1934 to 1939 peep sight with hooded front sight Model 80-C 1940 to 1970 semi-beavertail forearm Model 80-DL 1940 to 1965 semi-beavertail forearm with peep sight
22
Best left to a gunsmith
AnswerI just saw a rifle of the same make and model sell for $135.00 E.S.Hanson MarylandIf it has the original receiver peep sight $175 - $220 depending upon condition.
They had a Small round knurled peep sight