These are aluminum, which I personally feel would be better than the poly or delrin spacers. I did read the aluminum ones can fail as well. My dealer wants 100 for the factory ones. Are these any good?:
http://cgi.ebay.com/ebaymotors/FORD...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
http://cgi.ebay.com/ebaymotors/FORD...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories