Hey guys im just throwing this out there.
A few years back i owned a v6 dodge magnum I remember i switched from a single exhaust to a duel, but i didnt want the "cutout" on the bumper to show
So i ordered these from dodge they are called exhaust bezels you our local dodge dealer for about 10-11bucks a pair
It might be worth a try so see if they fit or not.
There is an actual template on that link you can print out and see if it will work
This is the part number
Genuine MOPAR Part Number:82210055