I haven't had much luck finding anyone to make any CF dart fenders, so if I do make my own molds and CF fenders, I will mold in my own flares, but that is a big project, and far down my to do list.
I've seen the ricer-style flares that are bolt-on - something like the Challenger Widebody deal. You should be able to find something adaptable. Obviously, it depends on the look & function you're after. You might even bow yours out if you don't need much added width; it's not as easy as it looks, though.