Like you, I toasted my Raider 15T right away, 3rd run I believe. Raider, Vorteks, Granite, Fury share many parts.
The way I understand the brushed motors, the higher the turns, the greater the torque, like you want for say a crawler. The lower the turns, the higher the revs and top end.
After my 15T toasted, I went to the LHS, they sold me a Traxxas 12T 550 brushed motor. The motor slid into place perfectly, no mod necessary, even the electrical plugs were identical. The 550 is slightly longer, hung out a bit more, but there's plenty of room.
The Traxxs 12T was $25 with tax, I believe. Gave my Raider more punch on acceleration. The was my first "mod", if you want to call it a mod. Down side to some, up side to me, it was a call for speed, a month later I was upgrading to brushless, LOL!
I still have the 12T, I'd be happy to sell you, cheap. The negative on my selling is the freight would prob be ridiculous and easier for you to hit a LHS.