Its kind of a easy fix. Just goto your local hardware store, buy some window screen, and small size zip ties. Cut screen to the size of the opening of the grille.
Feed screen down in front of radiator, attach it to the top mount support using the zip ties. Attach the bottom to something under the car as well.
Feed screen down in front of radiator, attach it to the top mount support using the zip ties. Attach the bottom to something under the car as well.