I'll try using the RPS9 power supply for broacade net-iron - the connector appears to be the same but can't seems to find affordable fans refurbished or new anywhere...If you're lucky, you might find a set of fans for the 7750 for $600-$650 (for 4); I often see them listed at $150/ea. I passed up several opportunities for a cheap 7750 because when I added up the cost of finding PSUs and fans, it often equaled or exceeded just getting it with everything from a different seller. At this point, I've about given up hope of seeing a -48F for a reasonable price and am contemplating a -26Q and doing passive breakouts to a fiber patch, or 40G MPO SR or LR to a splitter for the breakout. Only reason I'm eyeing the 7750 over a 6610 is that I want to use the campus fabric feature and turn my 7150's into port extenders and have a single management interface.
I was hoping the 6610 fans would work but not they don't