here is a link that has some parts for the rustler. look on towerhobbies.com also to find some stuff. ther ereally isnt alot of stuff you can do to it. if i remember right the tie rod ends are just a solid piece of plastic, get some adjustable ones. on the shocks you might have to get some off a different car with a lower suspesion. if all else fails try your local hobby shop and ask for help. the gearing you can change motors, change pinion gear, change spur gear, get a bigger battery but not to big to were you over heat the motor and fry the brushes.
Good luck
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