Yuasa 5C Rotary Servo help

I have recently acquired a Yuasa UDX-5CA Rotary and UDNC-100 controller. The rotary did not come with the motor unfortunately. Ive contacted Yuasa and all they can tell me is that the motor number from them was me3515-315b and that it would be a CMC/torque systems motor. I have not been able to find out any information on this exact motor but I have found some similar ME3515 motors on eBay for sale. Can anyone help direct me in the right direction to get this running again.

Thanks