Here's his homepage address. www.arp-net.co.jp Click on "vintage cars" (fifth link from top on left hand window). Machida-san who is the owner isthe only one that can speak English, but barely... I'm not sure if he accepts credit cards, but its worth a try. BTW, he has a sale going on for the spoiler right now.
This car brings back a lot of memories. I'm glad that the new owner has taken good care of the car. I wish I was back in CA to build more cars. BTW, I'm not in Japan but rather in Europe right now working for Jaguar, Land Rover and other autmotive firms. I still have a lot of rare Z parts that I want to use to build a 600hp+ 240Z just like the one that my friend has in Japan.