Ugly noises from fan in wife's '08 grand Cherokee

While running in the cold weather, it has sounded like there is an angry bird under the hood of my wife's '08 grand cherokee. After some highly technical investigative work (I popped the hood and spun the fan), I found the cause to be the radiator fan.

I tried RockAuto as well as my friendly VatoZone and "Orailee Auto pars." and can't seem to find one. Are these only available from the stealerships?

These guys might be better at Jeep info.
http://www.jeepforum.com/

An 08?

Replaced the clutch fan on wifes 07 Grand Cherokee,was covered under the Comprehensive Extended Warranty.Once the clutch fan engaged would not disengage,sounded like a P-51 fighter.

Is it not under warranty?

should be under warranty. Take it back and get it fixed for free