The company I'm working for now doesn't stock anything. I mean NOTHING.
Not quite as bad, but...
Back in the 1980's I was running Service and Installs for the US West Federal POTS contract and one day I was dispatched on an Emergency call to a USDA office in Enterprise, Oregon...about 325 miles away, for a system down. Apparently, the local power company was working on a pole near by when an "oops" happened. The TII Model 428 Transient Voltage Surge Suppressor took the hit and protected the Eagle One KSU.
I removed the protector, plugged the KSU directly into the dedicated/isolated AC. After verify the KSU & Programming was okay I plugged in the bad protector and notified the warehouse that they needed to mail out a new surge suppressor and left for home. That item was not a stock item. We only had them for new installs.