Like Routerdriver says getting your hands on the disks or software isn't going to do you much good if you don't have a backup of the parameters, highly likely it will just do a default install, then you would load in any parameters which relate to your machine.

This is why the machine is all over the place now after you have overwritten the OS, it has no clue about your setup. doesn't know which pins the limits are connected to, etc.
Even an AXYZ engineer won't know all of this without getting into the machine and checking connections etc unless they wire them in a standard way.! Possibly does but could easily not in which case he'll highly likely try to screw you big time. For instance.!

We have an old Hurco Mill and the Hurco Engineer wanted £55hr from the minute he left his house to getting back home, he lives 200miles away so it's the best part of £400 before he even touches the machine.!! . . . Hence we repaired it our selves. (well actually we ripped its guts out and putting a modern controller on it)

Do the previous owners have the parameters written down or backup disk maybe.? Or, Sometimes the main parameters will be written on a sticker inside the controller, maybe on the back of a door or panel.? Worth a look.

If it's going to cost you a lot of money to get an engineer out I would seriously consider retrofitting with a modern controller which runs from PC-based software then you won't have any of this DNC rubbish to deal with. I know someone who has converted a few AXYZ machines to run on UC300 controllers with UCCNC software and it's not difficult to do and transforms the machine and reliability.