A lot of these types of installations are bespoke, at least in large part.

I used to have a friend that worked at a particle accelerator lab, they had a complete machine shop on site so that they could make repair parts, or new parts as needed for various experiments. These are not things you will ever buy at Amazon or even a place such as McMaster-Carr.

I'm personally curious to see what will happen in 30 years. Its one thing to keep computers from 20-30 years ago running because generally the components are fairly simple, but not anymore.