can you buy new 1200 parts eg bumper bars crome parts wagon tail lights etc what are the interchangable rims that can go on a 1200 with or with out spaces i know some sigma rims and r30 skyline rims fit and the girlfriends n16 pulsarQ rims fit what other rims will go on a 1200

Some parts you can still get from nissan if you have part numbers.

wagon tail lights are rare. You will need to keep an eye on ebay.

As soon as you start changing diffs, front brakes/hubs etc, wheels become harder to find, and you will mot likely need to have them custom made from new.

I had a 1200 wagon a few years ago (it was great fun with a locker).
You can get NEW guards, bonnet front and bumper bar, all aftermarket. A few front (Blinkers) Also aftermarket. But As posted below. the tail lights will be a little more tricky.
With your rims datsun stud pattern offers you swap with old Toyota (Celica,Carolla,Carona etc) you can also use early model Lazer (like TX3 rims) Also for something more modern you can use Hyundai Excel (with Spacers in the front) or Suzuki Swift (GTI) they have some hot weels. Just double check the off-set and the clearence you have to work with before you decide and spend $$$.