You would want you an Alltrax SR (300-600) controller. Amperage is up to you and your needs. This gives you the best that is currently on the market, 2 year warranty, User Controlability with the Alltrax Tool Kit, and many more perks....
You can see them here
https://www.revolutiongolfcars.com/motor-controllers and call David Hicks (TahoeDawgZ71) with any questions or details for recommendations to meet your needs.