Rear Fenders on 1984 TRX200…repair idea

Hello all…my poor old Honda has been sitting on the back burner, and now it is time to get cracking on it again. The rear fenders on this thing are pretty rough. On the left side the fender is cracked completely across the top. I have patched it up with sheet metal and pop rivets, but on the right side, the lower half of the fender is completely missing. It makes for quite the pain…not only am I constantly worried about my foot slipping off the peg and getting sucked into the tire, but also I am tired of the back of my leg getting plastered with mud and such when I ride. So after much heartfelt consideration, I have concocted a scheme for fender repair and wanted some opinions on it.
I am thinking about buying a trailer fender, something like this one from northern tool, CE Smith Jeep-Style Fender with Aluminum Tread — 23 3/4in. Long | Single Aluminum Tread Trailer Fenders| Northern Tool + Equipment. My idea is to cut it in half and use the halves to make new fender fronts.
I have to double check the measurements, but I think I can just slip that up under what is left of the rear fender and attach it. I am sure I will have to do some additional bracing, but I am also thinking it may be long enough that I can tie onto the bottom of it and make something of a basket between it and the peg for my feet. I couldn’t find anything where anyone had done something like this, and maybe there is a reason for it, not sure yet. But for $25 I am thinking it may be worth the gamble to try it.
Thoughts, comments, concerns?