[MetalMan]

Don't go with the 8L for a 1/8 buggy unless you plan on using 10 cells. It will run very hot, give poor runtimes, and get the controller hot (unless you gear so low that it gives poor performance). The 9L is a very nice motor for 1/8 buggies (run one myself).

A lot of people make motor mounts using aluminum angle. Mine is a complete unit, with the rear bearing support being integrated into the motor mount, and a custom front bearing support. It is very sturdy, but you need the tools to do it. Aluminum angle (~3/16" or 1/4") would be the easiest way to go, assuming that you could find a large enough piece. My first ever motor mount was a 1/8" piece of aluminum that was attached to the bottom of the chassis using an angle piece, attached to the diff using the brake mount screw holes, and attached to the upper diff plate using an angle piece. The motor was over the diff, and bent the motor plate almost immediately.