Re-using the inner fenders would be painful, if not, nearly impossible.
Not sure if Robin was able to cancel his order or not. But BA had some coming for him, and I already had them for him at my place. Worth looking into. His are aluminum, but same structural design. They would work.
Or make something out of tin and strategic use of rubber matting.
Yeah, the install is a lot of hours. First time around I wouldnt be surpprised if it took you even longer than the suggested, depending on how thorough you get. Took me about 4 hours to get where Robins are and I didnt do inners, or re-install hood latches or hood pins.
That was with two of us and I was pretty quick with the cuts since I've done quite a few hoods.