You don't want to go to a blind mag with the newer centerfeed magazine system as they're a real pain to try to load - especially when there's a scope/rail in the way. This is why Savage doesn't offer any from the factory. Best solution would be to go to a standard (3-4 round) factory detachable magazine with matching bottom metal.

If you're looking to purchase a new rifle in a smaller caliber, maybe look at the 110 Varmint (varmint barrel). If you want something 6mm or bigger, check out the 110 Predator (medium-heavy threaded barrel) or the 110 Hunter (sporter barrel).

Savage does have a custom shop, just give them a call - there's an option for it in the automated answering system IIRC.