The only listing I have for a Savage 101 is a single shot 22 pistol. That has been out of production for years, but the rear sight is a simple dovetail V notch that a competent gunsmith could fit. If you are asking about a rifle, please check the model number, and check with Customer Service for Savage, and check gunpartscorp website.
Savage 325c rear peep?
There are a few places you can find a Rear sights for a Savage Model 120. The most popular place to look would be online or a gun store.
Numrich gun parts corp.They may be found on the web.
http://www.e-gunparts.com/products.asp?chrMasterModel=089Zz22-410&MC=
S&W, e-gunparts.com, Brownell's
To remove the rear sight from a Marlin Model 75, first ensure the firearm is unloaded and safe to handle. Locate the screws securing the rear sight to the receiver; typically, there are two screws on either side. Use a suitable screwdriver to carefully remove these screws. Once the screws are out, gently lift the rear sight off the dovetail or mounting area.
Sometimes it on the top of the barrel near the rear sight. Sometimes it's on the side of the barrel.
The standard mod 70 had a Winchester bead front sight on a ramp base with a sight cover. The standard rear sight was a Winchester 22G open sight. The rifles chambered for .375 H&H Mag had the Lyman 6W folding rear sight. Model 70 National Match (chambered for .30-06 only) had a Lyman No. 77 front sight on a forged ramp sight base and a Lyman No. 48WH rear sight. All receivers were tapped and drilled for popular scope and iron sights. The Model 70 Super Grade had a Redfield full gold bead front sight on a ramp with sight cover and a Winchester 22G open rear sight. (with acknowledgement to The Gun Digest, seventh edition, 1953)
They had a Small round knurled peep sight
Try gun shops, gun shows, pawn shops, want ads, egunparts.
Information on the Savage Model 24 and its rear sights can be found in various sources, including firearms manuals, online forums dedicated to gun enthusiasts, and websites that specialize in vintage firearms. Additionally, websites like GunBroker or ArmsList may have listings and discussions pertaining to the Model 24. For detailed specifications and parts, you can also check the Savage Arms official website or consult with knowledgeable gunsmiths or local firearm dealers.
Start with gunpartscorp.com then eBay and auctionarms.com