Unfortunately the BBC has decided Australia doesn't get to watch any Doctor Who that was released before 2005 or is a spin-off. So uh, anyone got a plex share or torrent with the lot? Immediate preference is getting the same versions as what is available on iPlayer in the UK, but would settle for DVD rips if that's what's available.
Probably Usenet.
High retention piracy.
Or you become a member of a private tracker and maybe they have a super collection.