Go to fastenal.com and search on the Chrysler part numbers for the fasteners. They have the exact factory parts. Most cities have a Fastenal brick and mortar store - I'm in a semi-rural area, and there's even one about 3 miles from my house. You can buy boxes of 15 or 20 or so of the fasteners for what 4 or 5 similar fasteners would cost you at the parts store - so basically a lifetime supply of factory-quality and exact parts for what you'd pay for a small handful of a similar part at the parts store for a one-time fascia drop.
I kept a box each of those Fastenal push pins and the plastic pop rivets used to attach the fascia and air dam strip (at bottom of fascia) when I had my Concordes. You'll need a pop rivet gun that can accept the larger pin diameter to install those.
Or you can find similar fasteners of the right diameters at NAPA, but, again, you'll pay a bunch more per fastener that way compared to a box of the factory part from Fastenal. A lot of people just put wire ties in place of the plastic pop rivets at the bottom of the fascia.