Bridgeport Stepper Motor (Amp Rating of motor)

Hi! I purchased 3 large round, 5/8" dia. shaft stepper motors off a
Bridgeport mach. I also purchased the Gecko G201 drivers, modified to
run the Nema size 42 motors. What I need to know is the amp rating of
the motors so I can set the driver amp rating? What is the OZ/In. on
these motors? Their is no name or spec.tag on the motors. If any one
can help me on this matter it will be greatly appreciated. Also does
any one know a good place to purchase power supplies for the these
drivers at a reasonable price? Microkinetics Corp.has a power supply
rated at 72vdc 5amps unregulated for $175.00 each,is this a fair
price? Should I just go with one large power supply? Thank you.Gary