Yes they STILL use NDBs in Australia and it is possible that you will be introduced to some basic NDB tracking for Advanced Grading. However, the process of flight grading is designed to assess a candidates rate of learning and retention so I think it is acceptable to tell them that you have no NDB experience.
With advanced grading, I think they expect more from you for the flying portion but as for sim work I know people who did advanced grading with zero instrument hours.