Short list of of larger VESC based controllers you can buy now(in no particular order):
Powervelocity Nextgen(California based):
24F NextGen PV Controller 144v
ES thread:
PV NextGen FOC 100-180v 36kw max - $799
3shul/Hackey(India based):
Shop - 3ShulMotors
ES thread:
HESC V1 150v 600Amp VESC...