I'd give Techno a call and ask them what they would recommend. I would expect they will charge quite a bit though as its probably proprietary.
If it ends up being too much money, the next step might then be to look at whether Mach2/3 would run it. Is there any way you can transcribe what info you have on the motors? (ie. steppers or servos, voltage, amps etc.). This may help someone more knowledgeable than me in determining whether Mach will work. Also, I'm not sure but you may need to bypass their controll board and add your own breakout board.
Anyone else want to take a stab at this?