why do you want Alu A-arms? a better choice would be the Pro-Trac kit (Pro-Line).
also, aside from the chassis, the steering components, and the body, all 2wd traxxas vehicles are the same. (slash, stampede, rustler, the bandit uses narrower a-arms though)
Traxxas Stampede (formerly Grave Digger), Custom Solid axle Beetle