You can go so far as to go to lots of custom bikes parts makers and order a "harness blank" but then you have to buy all the connectors. I'd look for a harness on Ebay from a bike from maybe 1995-on. The simpler the bike the better, as in, the fewer computerized parts and sensors, the better. That's why I'm using a Ninja 500. I'd look for a Ninja 500, Ninja 250, Rebel 250, any of the Nighthawks from those years, GS500...and don't pay too much. Don't pay more than $50, and don't bid on a harness with more than a couple cut wires.
Here, these guys have a decent price for the kind of connectors used on your Honda, so you can plug stuff into your new wiring harness from your old lights and stuff: http://www.vintageconnections.com/
This is a mind-boggling job but you can do it. Label everything with masking tape on both harnesses, lay out the new one on top of the bike and tape it down, and start taping things up to the part they'll hook to. You won't have some things, like a sidestand switch, so that will just hang free till you tuck it away.
Remember to get a diagram of the new harness from the same year as the harness's bike, and also get a diagram of your 360. It takes time, the ignition system may just blow your mind, rewiring mine sure is! There's help here, and likely on some vintage Honda forums, just jump in there and ask.