Assumably they have a maintenance contract with someone who provided the server, so why haven't heads been rolling.
My line of business is providing IBM servers to the NHS, and if we had a site down for this long, the *BLEEP* would hit the fan in an unbelievably bad way. I think it's pretty pi$$ poor to be honest, from a support view of the situation. And if there is a contract in place, i'd be seriously considering taking the matter further, and getting some compensation for it. No PSU shopuld take a week to arrive. You could fetch it from the supplier, and physically walk to the server in that time.
What type of servers are they using, do we know

if it's any of the main favourites, such as IBM, Compaq, Dell, etc, then they should have replaced it a long while ago.