i have tein coilovers on my zed, so i'm good, but, if anyones interested and doesn't mind waiting i found these on ebay New Zealand,
http://cgi.ebay.com.au/D2-Adjustable-Suspension-NISSAN-300ZX-1990-96_W0QQitemZ140075838026QQihZ004QQcategoryZ130653QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
works out to be 520 quid at todays rate.