For rails and mounting hardware, we suggest Evolution Gunworks products. We use them as OEM equipment on many models.
Their website may be found at egwguns.com.
The articles below may also be helpful:
https://savagearms.com/blog?p=how-to-find-the-right-bases-for-a-savage-centerfire-rifle
https://savagearms.com/blog?p=how-to-mount-a-scope
https://savagearms.com/blog?p=optics-anatomy-different-parts-of-a-scope