I found it. That and the ez start gears and motor and you're good to go.
It would be easier to use the traxxas ez start system though. Here's a link to the page with all the starting products.
http://www3.towerhobbies.com/cgi-bin...93p?&C=PDC&P=7
edit - If you could integrate the starter battery and the rx pack that would be one slick system.