For the price of that body kit you might as well have a custom one made. And no info on where you can still buy that kit either. But it is still a very nice kit.
Just in case you haven't solved this problem or was still wondering where to get the best but the cheapest, I know of this place where I got the body kit for my truck. Still looks good now. I got mine for less than $700. You might want to try it. I think they have the ones for Sedan.