I'm guessing you could head over to a dealer and get a quote.
I just looked in the 2008 parts book and it looks like part number 68021299AB is what you would need for the front, but that is both the whole bumper/facasia in the needed color with the "bright insert". I'm not sure you can get a painted back bumper/facasia
They might sell the chrome seperately now, it just depends on if they broke the parts into seperate part numbers. I would give your dealer a call!
Mods: Black Muffler, Rallye Spoiler
Mods (Just a matter of time): Intake Nozzle Mod, Upper/Lower Grille Inserts
Mods (Still Debating): Remove Door Pillar Black Tape, Murchison 2" lift + bigger tires, Body Colored Hatch Facasia + Black Jeep badges, Rallye Body Kit