Quadrant Suspension in Berwick Vic are the people i'm assuming ZEROGK has in mind for bilsteins:
 
http://www.quadrantsuspensions.com.au/
 
As for ADR approved, do you mean legal for road use?? It varies from state to state, but technically in some states, having height adjustable suspension is defectable. With either people listed, they should be able to advise you.

The whole thing must be road legal!

BTW: Stay tuned for an article in Fast Fours and Rotaries!!! Hoping to make the cover!!!

I must say I am leaning towards tiens, they super high quality and offer great product .. Just the $3800 price is up there! Bilsteins don't make an aw11 item by the looks of the catalog !, any other suggestions?????

Why dont you speak to a suspension specialist (a good one that is - there should be at least one in every state), they should be able to recommend something suitable for the cars intended use.
 
Great work BTW!
 
Cheers

Why do they need to be off-the-shelf? Get custom units made!
 
I can guarantee you that Teins are nowhere near as good as Bilsteins. And Ohlins are another step up again. I'd even go for those MCAs before looking at Teins.
 
If you're still not convinced then read this, it might help:
 
http://farnorthracing.com/autocross_secrets6.html
http://farnorthracing.com/autocross_secrets18.html
 
I have custom Bilsteins on my AW11. Best thing I ever did to the car.

Good point, just need to find someone who knows what they are doing in Brisbane

Have a chat to some of the guys in car clubs involved in motor sport etc, they will probably one suspension place that has a great rep and know what they are talking about. 
 
In Perth there are 2 places that most people go to and they know what they are talking about, and have extensive experience etc.  Also a quality 4 wheel alignment can make a huge difference, regardless of suspension used.
 
Cheers
 

Wow that engine is a work of art! Good luck with it, should go like a rocket!

You seem to be contradicting yourself a little... "just need to find someone who knows what they are doing in Brisbane", yet you have ordered parts from all over the world?
Don't compromise - ring around and get the info you need to make a more informed decision

quadrant are a bilstein specialist, and they custom build a set of coilovers to suit your needs, selecting the damping characteristics based on your needs. An old workmate of mine had them custom build a set for the front of his hilux, and a few aw11's getting around have sets made by them. I also had ajps in adelaide make a set of custom bilstein coilovers for a ke20 i'm building with a mate. Mca has more experience in motorsport, and build everything in house. I suggested them as they are in the same state as you, and i can vouch for the quality. They do make more basic unit's than the 4 way adjustable units, they are the only ones i had pictures of. Do your research and weigh up your best options, as zerogk said, you have put a lot of time and research in building a quality setup, do the car justice and put some quality suspension in.