Give all automotive import spares in QLD a ring they always have a couple of boxes hanging around. You will need the box, tailshaft, lines, lume, master cylinder etc etc. But they will sell it to you as a conversion kit. You are better off gettinga r34 one as the 33 box will fit but you have to get everything else made up such as tail shaft lume etc.
Take it to Steve at JAZMAC he did mine and has done all sort of conversions they guy is awsome. And he also knows your car i took it there when my girl was looking at buying it.
I can't remember the price but it was something between 3-4K all up with new clutch.
Deff take it to steve at JAZMAC though 83916200