Looking for a SCARA controller

I am not having any luck finding a controller for my Staubli RS robot. After some investigation, it looks like a standard controller with the following specifications would work well. Here is the list:
Operating voltage 320 V
Power requirements 800W, 800W, 400W, 400W. It is a 4 axis SCARA
Encoder type: absolute, single turn using EnDat 2.2 protocol.
Easy to program using drivers so I can use VB and control with my PC.
Does anyone know of a controller that meets these specifications?
Thank you.