Kalenn,
The capital expenditure estimate for PB is in Hartley's Report - AUS $200 million which is 2.5 x the Capex of AUS $80 million for AN.
AVB has applied for an increase to the ML to 18,000 tpa. That doesn't necessarily mean that the current plant can do that without Capex to expand.
AVB have said AN ramping up to 15,000 tpa by 2018.