"...I don't believe there is another one in Europe though."
This is so frustrating, because i
know i read that there
were definitely 2 in Germany, 1 in Japan and the rest in the States, out of a total of 17 chassis built, (
http://www.vectoraeromotiveclub.com/thecars/w8.htm); can't find the info any more tho'...typical
Have you tried:
http://www.vectoraeromotiveclub.com
There is loads of info there on Vectors; the site has only been running since the early part of this year, it costs nothing to join, and is very well run.
By the way, the one you photographed is chassis no.007