Updating an old Hardinge AHC w/ Omniturn to something more current

Greetings all! I’m attempting to help out an old friend of mine.
He has a Hardinge AHC with an Omniturn CNC conversion on it. A while back, his shop was hit
with a power surge that damaged the controller and/or computer. I’ve been searching Google, trying to
find out if there’s a practical way to use the AHC, with the motors and all that are on it, but update the
controller, PC, software, etc to something more modern, and hopefully cheaper than going back to Omniturn.
Can anyone point me in the right direction?
Any help would be greatly appreciated!!