Looks like the same design as my car, with the smallish body-colored upper grille and huge gaping black plastic lower grille.
Here's what my ugly lower grille block looks like:
http://www.gassavers.org/showthread....641#post124641
I made it from coroplast, a popular aero mod material. I used some tinted plexiglas-like stuff (I don't know exactly what it is, I salvaged it) on my truck but took it off after a month or two because of my transmission temperature. I painted my white coroplast with a lot of layers of adhesion promoter, flat black spraypaint, and Plasti-Dip spray. 3,100 miles later no touch-up is necessary.
Someone else on this forum has plexiglas that he painted and used for his upper grille, I think on a Saturn, and it looks great.
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