@ProjectPete
I managed somehow to get this onto dropbox. Just click on the links and it should download to your computer. Enjoy.
BCA_Guide
https://dl.dropboxusercontent.com/u/31843682/Building%20Code%20of%20Australia%202015/NCC2015_BCA_Guide.pdf
BCA_Volume_One
https://dl.dropboxusercontent.com/u/31843682/Building%20Code%20of%20Australia%202015/NCC2015_BCA_Volume_One.pdf
BCA_Volume_Two
https://dl.dropboxusercontent.com/u/31843682/Building%20Code%20of%20Australia%202015/NCC2015_BCA_Volume_Two.pdf
PCA_Volume_Three
https://dl.dropboxusercontent.com/u/31843682/Building%20Code%20of%20Australia%202015/NCC2015_PCA_Volume_Three.pdf
Performance_Requirements
https://dl.dropboxusercontent.com/u/31843682/Building%20Code%20of%20Australia%202015/NCC2015_Performance_Requirements.pdf