My mill has similar motors (Baldor), almost the same specification. I am running 2 of those, and a 6.3 amp stepper (z-axis) on one 75V, 5 amp power supply. I can do 200 IPM rapids, but normally limit it to 100 IPM.
In actual operation, the motors draw only a fraction of their rated current.
The other alternative is to find a 120/100 volt transformer and just build your own power supply. Just need a bridge rectifier, a couple of large capacitors rated for the voltage, and a 15K or so 5 watt bleeder resistor. That will give you about 141 volts.
Something like this https://www.ebay.com/itm/Gomi-Electr....c100005.m1851