Here's a few names of controllers to start a search
Adaptto
Alltrax
ASI/BAC
Kelly
Mobipus
Nucular
Phaserunner
Sabvoton
Sevcon
Silixcon
Votol
QS...For cylindrical motors, its hard to compete with Quan Shun
Motenergy...Used by Zero motorcycles
AGNI/Lynch...Axial Flux