Newbie needs help with VSD-XE drive.

A few years back, I started to build a CNC router using Adept robotic arms, so I enlisted the help of KSI labs and bought a Centipede board, sent the servo motors to KSI labs and he wired the whole system for me. At the time, I only bought one VSD-XE drive and now I hear they have been discontinued. I still need two more drives to continue with the original setup. What I want to know is, are the new Argon drives compatible with the Centipede setup and with Mach 3? I have contacted KSI labs and he told me that he didn't have time to talk on the phone and that he would send an email. I know that time has passed, about 4 years, so maybe there is a better way to go? Please help to guide me through this. I have most of the structure built and am beginning to set up the electronics. I am using the servo motors that are installed in the Adept arms. Bob.