When these cars were new, I was working in an autobody shop. We fixed much worse with amazing results.
Most of the labor on straightening something like this is the disassembly and reassembly. If you strip the car down and have it ready for the shop, I'll bet it can be done in a few hours. From the pics, you are not far from it. Remove the bumper and CAI, and leave the hood. You'll want to have a proper wheel and tire in place and the new fender for the shop to work with alignment. Frame machine time is precious. Take your pics to a shop and discuss with them before you show up with the car. Emphasize that you are looking to get the frame work done right, or else you can end up with quick and dirty, and be no better off.
A proper autobody shop will have all the measurement specs to get everything back in place. Without those measurements and tools to measure, you'll be fighting fitment and alignment forever.
I'd definitely find a good Ford-made fender, either NOS or used, before getting an aftermarket. The savings in the fender will be lost immediately when paying a shop to straighten things out.