Whatever you do, avoid ebay sellers who don't list the manufacturer of the parts. If you click on the "Buy Parts" link at the top of this page, it will take you to a catalog. Phil has good prices on these parts. Perhaps not as good as the cheapest ebay sellers, but he has OEM parts and will be there if there is a problem with them.

I'm not exactly a neutral party. I have no affiliation with this site, but I was burned on an auxiliary fan assembly by an ebay seller less than a year ago. Phil had the right OEM part and a great price.