Comment by justin66

Interestingly, there are a few places that will sell you a warrantied and new desktop or rackmount PC with a Windows NT 4.0 license. I imagine buyers of their systems are often in similar predicaments, not sure who else would buy these.

https://nixsys.com/products/nx370-t90

There are some things I don't understand about the OP's constraints (are you sure you can't run that Amiga VM on a newer version of Windows, or better yet, run that Amiga-based software on one of the currently supported Amiga VMs?). But they can probably pretty easily keep going as they're going with this software until some other, more significant thing in that plant becomes fully obsolete and the place is shut down.