Yazaki was the manufacturer for wiring for our cruisers. Unfortunately, even today harnesses for all vehicles (weather assembled in Japan or US) are produced over seas. I would be suprised if you could find a source here in the US. I have gotten striped wire from another major manufacturer - Packard Electric. Not sure where to buy that stuff though (they have striped wire also, but not the same as the cruisers - stripes are usually black or white). Not trying to burst your bubble, but I think you may have a very hard time finding what you are looking for. Great question though - get the answer and I'm sure many of us will be interested.
Good Luck