The 250 Savage, also known as the 250-3000 Savage, is a wonderful cartridge, especially for those who may be recoil shy.
However, popularity has waned, and I doubt few, if any, commercial rifles are being chambered for it. At least as far as I know.
If I had a rifle that was chambered for a near-obsolete or hard to find cartridge, I would accumulate a good supply of brass for reloading. It's a very good reason to learn to reload, if you don't do it now. And you'll find it's easy and safe to reload, and interesting too.
By reloading, you can choose from quite a few different bullet weights, and you'll find yourself shooting and enjoying your rifle a lot more.
NCsmitty