Even if you can order one from Nissan, it could be six months...a year...or even longer before you get one. I've run into this problem several times when I worked for Nissan and personally after I left. In 2006, I ordered a main harness for my 97 Hardbody after a short burnt it up. The harness was $1300 and I ordered it "customer care," which is supposed to put a priority on it. I waited 18 months and it still hadn't come in when I canceled the order and sold the truck for parts. I've waited over a year for a Sentra engine harness and a year for another Hardbody. So, keep that in mind if you plan to go that route. One of the things I considered doing was seeing if Wiring Specialties would rebuild my original harness if I sent it to them. They make Nissan harnesses for conversions, like those putting Silvia SR20 engines into a 240SX. I never got around to doing it, but it's something you may want to look into. Used harnesses are hard to get for several reasons. For one, it takes a lot of labor to get them out without damaging them; harness clips get brittle and break easily when they get 10 years old, as well as the tape and plastic conduit protecting the harness. There can also be multiple harness part numbers even in the same year, besides just I4 vs. V6. Automatic vs. manual transmission, drivetrain, and Federal vs. California emission certification can also create different harnesses. Mice also like Nissan harnesses (it's like they made the wiring insulation out of cheese!) and you never know what you might find wrong with a harness that's been sitting in a salvage yard for years.