i am getting all rpm racing parts for my gt plus rtr. go here and check them out
www.rpmrcproducts.com they are made out of a nylon i think but they are stronger than the stock parts, lighter is what ive heard. and anypart broken they will send you a new one. and they come in blue! they dont have shock towers but get some titanium for that and then some lunsford or get the factory team blue titanium turnbuckles and all that cool stuff