I finally got around to making the vent cover for the front bumper. I bought a $12 piece of scrap aluminum and cut it to look like this
This is what it looks like installed. It is being held in place by the license plate bolts and the fairlead bolts. The top notch is for the winch box lid lock arm. The bottom tabs are for the fairlead bolts.
I decided not to paint it right away. It's just a sanded aluminum and I kind of like the contrast between the aluminum and the bumper. It may get sprayed gloss black within the next couple of days. I didn't use any sealant around the edges yet. I don't want to apply that stuff until I decide on the color.