call savage to find out how much a factory bottom metal is and the magazine, you will need screws also and maybe a trigger guard. Then call boyds or stockys and tell them what you have and that you need a stock. when you call savage they will ask for the serial number, that will tell you everything you need about what parts you will buy. whether it is a center feed or a staggered feed.
you could call and ask sharp shooters supply how long it will take, and it could take a LONG while this time of year. They list the service for inletting for $50, it might be a good time to get that Savage accurized, they do awesome work but it takes awhile.
If you have a synthetic stock you will have to get a wood or laminate.