Well, this is fun.
We have an old door access system (now considered obsolete). At least a year ago, we let management know that this system was on borrowed time, that new parts are unavailable, and that if the system dies, we could lose access to important areas. We were thanked for the information, as well as asked to get quotes several times (with what I imagine was no real intention to purchase anything) - to the point of annoying the vendor.
Today, if has become when. We have lost access to two secure rooms. Now, critical functions are affected and we will have to scramble to get up and running.
Sometimes, there isn't much you can do. Management will have to come up with a solution to gain access to medicine and supply areas in the meantime.