I keep power supplies around when the device they were supposed to power goes out of service. The collection has grown to a big crate of assorted power supplies

I keep power supplies around when the device they were supposed to power goes out of service. The collection has grown to a big crate of assorted power supplies where I can hunt for a spare. It is common that I have to solder on a plug from another power supply, but it's not rare to find multiple compatible supplies that have the right plug and specs. The scenario you describe, where I'm looking for a power supply among a set of devices, to power another device, that is less likely to turn up a winner. But chances are non-zero enough that I do wander around looking for other options when a power supply is missing.