If I had to do those kinda fenders on my car I'd do it with the libertywalk kit and have it fully molded to the car. There is a Chinese replica LibertyWalk kit that is under $1000 and made with PU. When properly prepped, and fitted, it would probably look better than LibertyWalk's FRP kit
Real talk, don't do it. Unless you have another one that is stripped out specifically for the track.