sorry, I wouldn't be able to help you out. You can usually find supplies online, however- since it's imported I'm guessing it's right side steering/ controls and you'll have to be careful w/ some of the add-ons... What is it by the way? '86? sw20? fd3S? R34? s13?
anyway, only a few after-market mods will need to come from japan... you should be able to find most of the hardware somewhere in the states or canada.
what r u planning on doing to the vehicle?