So just to update, I finished these, and upon further inspection, they fender is actually 3 pieces. The liner, the fender, and the hard shell under the fender. The three are separable, and with a little finesse and carefulness, you can get them all apart. After that it's just a matter of bolting the fender liner back in, and making cuts where you see fit. I cut a little less than I needed, and tucked the liner back inside of the fender, and it came out great!
I would say this project is 80% getting the balls to do it, 10% patience, and 10% skill. For anyone reading this and wondering if they can do it, I say go for it. IF you mess one up, you can buy the stock liner for $35 bucks and try again.