How about ya reverse mount the body. Then you'll have a Rear Steer car. IMAGINE how Sharp you will be able to carve a corner!

UUhhhmm.....Sorry.....just trying to add a bit of Humor to a Bummer of a situation.

Seriously tho. I cannot see how such a simple Motor cannot be made to turn in the opposite Direction.....I has reverse,,,,,right?
Perhaps the limitation is the ESC. Maybe the sensor will nor operate correctly with the motor running in an opposite direction.
Perhaps a new ESC. I think I read in a RC Mag that you could run a Sensored Moter with an ESC that has no Sensor. But you cannot use a SENSORED ESC to run a Non sensored motor. Does that make sense to you Electric RC folks?