Go to Walmart, Lowes or Home Depot, and pick up metal or mesh screen. (the kind that goes in a screen door). Figure out a way to attach it behind the grill. I have had it on the Fusion for two years now. It doesn't restrict air flow at all. But my radiator looks brand new.

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(SOLD) 2003 Ranger 4.0L V6 FX4
2001 F150 Supercrew Triton V8 (DD)
2008 Fusion 3.0L SEL V6 (my baby)
1992 Taurus SHO MTX (my toy-almost Supercharged)
2004 Nissan Murano SL AWD (Wife's car)