How do I find this thing that I don't know what to call?

We just installed a new CT machine and it has a big, red emergency shut-off button (I presume for in case someone starts an exposure while someone is still in the room). The problem is that the shut-off switch is mounted in and area and just at the right height that people like to lean back against it, which causes all sorts of problems. I need a clear wall mounted box with a face that opens to access to keep people from accidentally pushing the button but still allows easy access to push it when needed, and I’m having no luck finding such a thing. Is there a name for these? Where would I find one?