So I've got an NVS4000 that I'm trying to find a replacement fan for. The fan that used to be in it seized up, and as best I understand it these PSU will not fully power up if the fan doesn't start (tested it by manually spinning the broken one on power up and observed the rest of the PSU happily firing up).

What are my options to find a replacement fan for it? I'm guessing that slotting a 12v PC case fan in won't do the job.