naw. get it from tower! cheaper. dont get aloy shock caps. you can get stronger shock caps but then the next weakest link is going to break which is the shock body. I would Strongly sugest getting some stronger shocks, that is what I did on my rusty. If you still want caps for the stock shock bodies theseones will work,
http://www2.towerhobbies.com/cgi-bin...?&I=LXJF00&P=Z . I also sugest buying this
http://www2.towerhobbies.com/cgi-bin...?&I=LXAKE0&P=7 , the stock servo saver is JUNK. and use this rear tower
http://www2.towerhobbies.com/cgi-bin...?&I=LXSK21&P=7 . the front shock tower dont break to often for me.
I dont know how much you plan on spending but a high torque steering servo is great. like this one
http://www2.towerhobbies.com/cgi-bin...&I=LXDWF8&P=ML
Hope all of this helps.