http://www2.towerhobbies.com/cgi-bin...?&I=LXSG25&P=7
front steering blocks, rear carriers, graphite

i dont see alum body posts or a bumper, but an alum bumper will get destroyed.
http://www2.towerhobbies.com/cgi-bin...=++&search3=Go
thats rpm's bumper, and RPM stuff is durable as all hell.

if youre having a problem breaking body posts, the best advice i can give you is A) trim off too much excess post above the body. you really want just enough post to get the pin through. too much longer than that and youre just begging to get it ripped off. B) and most importantly, keep the wheels pointing down