To my knowledge there has not been any body kits, there have been some custom made.
Can measure the diameter of the crossfire wheel archws then compare measurements to other vehicles that have several body kits see if you can find a match, then it is cutting and fabricating.

There have just been a handful done.
It all depends on how much you can do yourself vs how much you would have to pay someone to do.

If you have to have someone do everything for you, you can go to a couple good body shops in your area and get some estimates, will cost quite a bit if you have to have someone else do it all.
Then there is more pricing on wheels and tires and all the parts.