In terms of quality, stick with AM (AmericanMuscle.com) they have quality product there. I've had my louvers on and its my DD (Daily Driver) winter/snow/summer/rain/shine/all that jazz. If you go looking for the dealership, expect to pay stealership prices. $300 - $500.
AM sells em for cheap, and pre painted as well. You can also self install these within 5 - 10 minutes including proper measurement and such. They are just stuck on using 3M Doublesided automotive bonding tape (or something like that)
You'll learn very quickly that doing anything through the dealership is going to lighten your wallet quickly.
quite the playground and can also lighten your wallet quickly, just with a whole lot more product.