Hey Marko....I drove 001 a few years back when it was previously up for sale....wasn't standard anymore, and it went just fine. It must have been returned to stock in between. The price was very reasonable for what it was, and I should have bought it at the time.
The history behind these cars was very simple, and basically the same as the full rego R35s that came into the country a few years back.
Under the old import scheme, if the manufacturer did not bring in a car, a private importer could. Scuderia did. I understood it was 5 but I have been wrong before. I would also be amazed if some were sold to gibson for racing, although Alan/Jim/Fred or Terry could no doubt confirm...those cars came direct from nissan jp AFAIK.
Once the manufacturer decided to import, no-one else was allowed to anymore so it was shut down (good old monopolies protecting off shore manufacturers). There were no more full rego GTRs imported until late 1993 after Nissan started selling them (which makes my 91 one of the very few in the country for that matter...)