to be honest i don't know, but i doubt there are any along the outside of teh fender, but your in luck. i am cleaning and painting the fender wheels this weekend so i will look and tell you.. side note, i went from level 3 to level 2 on my truck last week. i have not changed it in a while and i have added the fans and i think the K&N intake while on level 3. i really think the truck likes it better on 2. i got a increase of 2 mpg for the first tank , didnt lose that much pep and it runs smoother. do you have an edge tuner? if so what level? wanna test yours if your on level 3 now?
EDIT***
found these.
http://cgi.ebay.com/ebaymotors/Ford-...=p4506.c0.m245