ORIGINAL: rusty basher
Nobody currently makes or probably will make a 2 speed for the rustler. I have seen one heavily modified rustler using the 4tec 2 speed in it. I would not recommend doing this however. Why don't you just put a bigger engine and do some regearing. Mine goes over 50 and is plenty fast on the low and high end with a fantom .18.
I was thinking about getting that .18 for my ST, how do you like it? What does it compare to?