R33 gtst Do-Luck chassis bracing kit. This looks like a roll-cage but isn't, it serves the purpose of stiffening up the rear part of the car. Same thing as this http://www.jdmautolink.net/2019/01/do-luck-rear-tension-set-bcnr33bnr34-05.html
In my discussions with a Senior Inspector from Qld Transport, this does not require certification/mod plate as per his email " In reference to your Rear Tension Set I have done some research and I agree that it is not ROPS and as long as it does not affect the ability of the vehicle to comply with an acceptable level of occupant protection and comfort therefore with the padding you have applied and providing the device does not obstruct passenger access or headspace then I see no issue. "
It is LIGHT so, can post anywhere in aus at your cost, or pickup in Brisbane.
$375 + any postage cost, I estimate around $30-40 to most delivery areas.