We have a large number of the 2U SC832 and SC833 cases from Supermicro that have been real workhorses over the years and some have had various motherboards in them as time went by. All of them are 5-7 years old and we would like to keep using them, but are concerned about the fans in the power supplies getting worn out and failing. Anyone have the source for good high quality fans that would work in these 400 and 550 watt single power supplies?

Anyone have an idea of what the normal life of one of these power fans is? All of them have been in good datacenters from there first use.

Since I know there are a lot of Supermicro users on this forum I figured this would be the best place to ask.