If you don't mind ordering online - you can go better than stock. You can also order by mail, I believe - though it's outside Australia. The parts you're looking for are not all that heavy or bulky.

But for whatever it's worth - here's a link to a polyurethane parts company that I go to for suspension bushings that has an online catalog.

Energy Suspension: BUMP STOPS

They make all sorts of kits for performance suspensions.

OH LOOK AT THAT! There's an Australian distributor:

http://www.energysusp.com.au/

(The web page seems a little rough, but it has the info)