Go to the salvage yard and get a trunk seal from a 97+ GP.
Cut enough to fill the gap between the grille portion of the bumper all the way to just between the Low beam and the corner/parking lamp area.
It works nicely because of how easy it installs -just hook (make sure you get it on all the way) it onto the bumper cover lip under the headlight and it stays put.
It totally eliminated my bounce and looks good.