Why not just sit the two that you haven't passed? That way you can go to the airlines and say that you have passed all 7 Australian exams (the fact that some are lapsed should not matter, as that is only a CASA requirement).
That way you will have your ATPL, experience on type and passed all 7 exams at one time or another! Just don't f
k the two up, cause then you will be left without a licence.
Cheers, HH.
PS I actually think that requirement was brought in to stop people with limited experience circumventing the Aussie system. If you have an O/S licence and some considerable experience on type (ie:not a bare type rating), I think the airines (perhaps with the exception of QF) would look most favourably on your application.