We make several controllers, covering a wide range of motor current. All our controller can be driven remotely via radio transmitter. If I understand correctly you have one motor only, which I assume is permanent magnet.
In this case you should be able to use our AX1500SC. If you can send the data sheet of the motor to This email address is being protected from spambots. You need JavaScript enabled to view it. it will help.
Otherwise we would need the battery voltage of the motor and the series resistance to make sure this controller can do the job.