Not entirely the same problem, but could be a similar solution...
At my old job, we had problems with people trying to refill the toner for the Oce plotters. Of course, some are completely inept and end up spilling it into the plotter and denying it to everybody. IT put a hasp and a small padlock on every large format printer after a few incidents like that.
In case there is no password protection on the actual printer interface, you might get away with something similar, depending on whether you are allowed to drill holes in the machine and what shape the panel is.
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If you are going to fly by the seat of your pants, expect friction burns.
"I don't know" is the beginning of knowledge, not the end.