Small circulating fan to cool amps

Radio shack does have 4 1/2" 120V brushless with sleeve bearing cooling fans that work very well. Noise is 38db. Airflow is 65CFM. They are fairly quiet and move a respectable amount of air. I have a total of three wired to 1 toggle switch with a red light so I can see when their on for the audio side of my cabinet. They are mounted on the back and pull air from the front. I also have one 3 1/2" fan from Radio Shack that I wired with a thermostat from a 20" box fan to keep my DirecTV HD receiver cool. They work very nice. Catalog #: 273-241 for the 4". Cat # 273-242 for the 3". I just searched their web site and they show these.
Please note that I have these plugged in a separate wall plug from my power conditioners to prevent any AC noise.

Check the SHERBOURN website. They have fans for this application.

Thanks. Unfortunately, both units are just too large and heavy (appears the Sherbourn comes in just one size - the 3 fan unit and is 12v). I saw the same (3") fan at Radio Shack - I've got a pretty limited space - was hoping to some how attach the fan to the uprights on my rack - the fan(s) would need to be pretty light to do so.

A cool (no pun intended) way to do it if you have a couple inches under your amp shelf, is to cut a couple of four inch holes (or whatever the fan dia. is) in the amp shelf itself, and mount the fans to the bottom of the shelf blowing up at the amp's bottom, which if it's not solid, will provide sufficient air movement to keep them from overheating.

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I still think you should buy a 12vdc power supply and then you can plug the fans into the wall recepticle like you want to. Get one with enough amp rating to run all three off the same supply. Radio Shack should have them too.