I learned today about this controller used in electric scooters.
It’s a compact VESC design with an aluminum PCB and direct MOSFET cooling. Because of that, the 100 A rating might be sufficient for foil-assist applications. They also offer more powerful and dual-motor versions.

Mentions in the forum:
'SPINTEND 75V | 100A x 2 Motor Ctrlr Ubox based on VESC + Uni1 remote
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