Would it not be just as easy for you to order direct from Japan?
I also found this site. They might be able to bring the kit in for the Z.
Varis : Garage88, Distributor of high performance car parts
You could also talk to Bulletproof. They might have someone down under that they deal with.
Nissan 370z Z34 | Bulletproof Automotive
Or Nengun.
https://www.nengun.com/info/about-us