If you are using a forklift motor, it may have come with a controller. You could always use that.

Alex from Sector67 designed the Paragon for Fauxrarri, and at some point, will be selling them, but no one knows when.

Phantom Power Racing developed their own controller using an FPGA thingy, and it's impressed a few people. No details are available yet.

You can try using a electric scooter controller. They are usually from China. They usually break.

• Paragon from Sector67
• TNC Scooters