Hi

I also moved from the UK to Perth around 18months ago, I looked around for 12 months until I found a mk2 Golf GTI, I eventully found what I was after a small bumper 3 door 8v GTI (imported from the uk in the 90's).
I have only seen three others for sale in Perth and they were all 5 door big bumper models and one was an automatic!!,
I also brought my 16v Audi with me from the UK, it cost £1600 and 8 weeks to ship, was only held by customs for one week but had to pay around $2000(£800) customs fees/steam cleaning charges etc etc, all up around $6000
I paid $5000 for the Golf so shipping yours from the UK shouldnt work out to be much more expensive than buying one here.

Hope this helps/gives you some ideas

Ian