Aaron,

Both of these shops have the original E4 plus the rubber spec car:

http://rc-mushroom.com/index.php?cPa...a&filter_id=41

http://rcmarket.com.hk/index.php?cPath=52_105

I run the original but I think the RS car would be better due to improvements made in some areas, such as lighter drivetrain components etc.

As for spares, like all cars you'd probably need to carry arms, hub carriers, driveshaft blades, & spare belts.