Please dont put TT's on a camaro. There are plenty of options out there that look better. If you want something classic looking :
Rocket racing boosters, and they come in the sizes that fit 2nd gens perfect.
You're on the right track with Kore3. Those kits are hard to beat for simplicity, availability of parts, and performance.
For suspension talk to PTFB:
http://www.pro-touringf-body.com/ He has great kits and I'm almost certain he has an Australian distributor.
For tires I like the Nitto NT555's for a street tire, they come in the right sizes and im pretty sure that :
http://driverzinc.com/ could get you both the wheels and tires. Id definitely mount them here as shipping would be killer.
Good luck with everything, keep us posted.