Need a controller for tracked vehicle

I am interested in a product that could help me with my project - a tracked vehicle. The tracked vehicle has two motors, the technical specification of the motors and vehicle:
Motor Power:24 Volt 500 Watt
Motor rpm:1400
Use 1:30 reductor aand
Output shaft speed 46.6 rpm
speed 3.8 km/hr
weight approx. 350 kg
I want to know which controller suitable to that tracked vehicle?