Looking for assistance on 83 5.0

I have a 83 5.0 that I took in to store. The owner has abandoned it so now it is mine. It is a extremly clean GLX convertible car with only 43000 original miles. Problem: It was burned under the hood and needs a wiring harness from the fuse box forward. The owner bought it back from the insurance company with the plans of fixing it but with his education being in accounting he really had no business attempting it. His decision to cut the harness off at the firewall tells the story. I am open to suggestions, leads, even someone who has one for parts. The salvage yards in my area are prone to just ripping out motors that are worth keeping making the harness pretty useless.