Yes, my friends, but how about the disintegrated foam that used to be glued over the interior side of the vent itself. Without that foam, air leaks around the vent into the cabin and rattles against the frame. Mine rotted away about ten or fifteen years ago.
May I suggest an alternative solution to the foam insulation on your center vent plates? This may not cost you anything, if your lucky. You will need about a 6" by 12" sheet of packing material. This material is typically about 3/16" thick. Usually this can be found used as soft filler in packages or as the wrapper on various computer equipment. You will also need your tube of Super Glue and scissors.
Remove your two center vents as you need to clean the dust & grime off them anyway.
Using your vacuum cleaner to remove the remains of the old foam, cut to fit the new packing material for the vent plates. Next, glue them onto the vent plates. As Super Glue dries very quickly, waste no time in fitting the sheets into place. As you can see in the photo, the new sheets are in place providing an air tight seal.
Total job cost, $0.00. All the components were found around the house.
Now, if the white styrofoam sheet is not your favorite color, try painting the sheets with your kids water based school paint, or a black magic marker. I leave the decor arrangements to you.
Mildred Hargis