I've run into the issue before, and it takes some leg work, but this time i'm trying to stay ahead of it.

Street Scene makes a wing/spoiler for the f150's, similar material as their bed rail caps. I can't seem to find a supplier... Anyone know of any?

 

I have a wing like the one in this link "The low profile one" mine is black and for sale! http://www.stylinconcepts.com/parts..../categoryid/25
Also try this link.http://www.truckperformance.com/prod...Fairings/0/0/0
If you are looking for a spoiler then these two sites also have them.

 

it may be hard to see, but something like this
http://www.streetsceneeq.com/product...950-707161.jpg

 

http://www.streetbeatcustoms.com/sse95070716-sy.html
$166 shipped