[Christ]

It's in the right place, that's sure.

Do your fog lights work?

Do you have saran wrap?

Can you get access to some spray foam?

Tag off an area of the lower grille that you'd like to block, layer it with two layers of saran wrap, and spray it full of foam in layers. As soon as the foam is thoroughly set up, you can remove it, poke holes through it, and use it for a plug to AABBAABBAABBAA (etc.. you get it.) test whether it's something you're interested in doing.

You can do the same thing w/ the upper grille, if you'd rather try it there first. Upper is better, since the lower portion is already aerodynamically "dirty".