Equipment Suppliers You Can Trust?

Steve Gray asks: "It has happened to all of us at some time or another. You're two weeks from deploying an application, but suddenly your testbed server falls over, and just won't get back up. After fighting with a variety of companies to try and get parts delivered for Tuesday, I'm finding that most companies will stall your order for days for reasons from random extra checks through to migration of lesser known species of Vole, business needs be damned! Who do Slashdot readers turn to when technology goes wrong? Do you trust them to deliver by tommorow, without fail?"