I got a hitech 645MG servo for 45.00 and a Kimbrough servo saver for like 6.00 at my LHS. tower has them for a couple of bucks cheaper but by the time you add shipping, and i needed it now it was worth the couple of bucks.

But everyone that has a savage upgrades the steering servo, then puts the stock steering servo in place of the stck throttle servo. Then you will upgrade to heavy duty dogbones, about 14.00 bucks a pair. Had my truck since last thursay and broke 2 stock dog bones already