If you were in America I would say, Just get them from interlibrary loan and photocopy them--but I think you are in Australia, right? Do they have interlibrary loan there?
BTW, The last time I suggested that someone copy a book, someone got on me for copyright violations but I read the notice on our copy machine at seminary and it says that fair use allows for copying of materials (does not limit the extent, either). It also says that the librarian has the discretion to intervene if fair use is being violated.
From my reading of the statue it is clear that fair use can't be violated if you make one copy of material for yourself for scholarly purposes and do not distribute it, becuase the statue also mentions the purpose of scholarly study as being a legitimate reason to copy a work.