try menards, lowes, or home depot for those bushings.
we have a hardware store called Macs. local thing
they sell all sorts of stuff that a true value would never sell. there is probably one like it in your area
I also had a 2wd version.
Ratty kids fried the motor the first time they played with it.
Traxxas warrantied it and sent me 2 motors. then it sat in the shed for a long time untill i sold it a few week ago