Well when they did their costing at $59/t usd in sept 2010 re exchange conversion to aud was 80-90 cents.
So $65-73 aud.
Currently your looking around $80/t aud.
Problem is not sure they can convince anyone to let them have a crack.
Also you wouldn't want to do 1mt one year 3 mt the year after and 5 mt after that. You'd want 3mt from the get go as keeps costs down.