You don't need a "whole new" one, most likely.
You only need the impellar half.
(flat plate of metal, plastic fan on one side, metal pulley on the other)
Dealers, etc, will carry the white ones.
Autopart stores will most likely have the black one (still CAN be used, if you feel like changing it in 45,000 miles, again..)
and NAPA can get the metal ones..
The impellar piece should come with a gasket, as well. (I think it comes with a new BELT as well.. if not, get one. Replace it, while you are there.. all of 30 seconds more!)
Ray