Looks like you can get them to match your paint color as well.
This site has a HOWTO install (must register).
http://www.fordtruckworld.com/howto.asp
From there I found "Auto Ventshade - The entire kit consists of the Bugflector II, a small parts bag and the well written instructions. The only tools needed is a Phillips-head screwdriver.
The Bugflector II is colormatched by using 3M ScotchCal High Performance Films. "
Colors and Paint Codes available are:
..Oxford White YX
..Bright Red Vermillion E4
..Amazon Green SU
..Deep Wedgwood Blue LL
..Harvest Gold BZ
..Toreador Red FL
..Light Prarie Tan BA
..Black UA
More colors to be made available.
"Bugflector II
wrap around design offers a sleek, aerodynamic appearance that contours to the lines of your vehicle. "
I haven't found "Auto Ventshade" for the '03 yet, tho, but they appear to be sold on a variety of sites.