Yep, go and see Greg at Classic Oz Wreck.

Little tip for you, Sydney is a shithole. It takes so long to get anywhere that doing the old "cruise around looking for wreckers" takes you so long and costs so much in tolls that it's not worth it. Then half the time they'll say they have something and when you get there they don't and it's just taken you an hour of your time.

Much better off with someone like Greg, who isn't in the Metropolitan high rent areas and specialises in what you're after. The small country wreckers would be a good bet too. I'd be suprised if there are many places left in Sydney that would even take a second glance at a HZ these days.