you can try doing what is done to custom mount aftermarket subs, with a custom wood sheath for the subs, and even possibly upgrade them since the stock ones kinda suck, i have the same issue in my moms 06 fusion, and im pretty sure its the same door subs. The other option is to turn the bass down and just deal with it.
2003 Redfire V6,
Show: Smoked everything, cobra front bumper, gt rear bumper, rear decklid and lower valence blackout with black mustang letters, 5% rear front 15%, black 98 Cobra rims front, 95 Cobra R rear black with chrome lip, black scoops and spoiler and exhaust tips
Go: CAI, True Duals with flowmaster super 44's, Bama Tune, full suspension (lowered, 8.8, 4.10s, UCA, LCA, springs, CC plates)