I got mine for an '06 through my dealers parts dept. The manager always charges competitive prices after ten years and four cars. I don't remember what I paid but it didn't require any changes to the car , such as snaps that I have had issues with on some models like the Magnum.
Now you will be told you shouldn't use it, but my view is, if it is used for specific occasions and then removed and you know that the circumstances would almost surely cause road debris damage then definitely use it. Just don't put it on and leave it there . Also, after use, clean down the outside with quik detailer and brush and vacuum the inside to make sure you don't put grit from the last trip next to your paint for the coming trip.
As in life there are some trade offs but I can find no damage from using it and had I not, I could sure point out all the tiny gouges to you.

Good luck,
RP