http://www.gumtree.com.au/s-ad/regen...dan/1019774469
That is owned by a forum member and on the east coast. I know its not a series 3 but maybe worth a look.
I just bought a liquid silver series 3, manual with all options except sunroof, just over 100ks. There was another at a car yard in Brissi, manual with roof but no leather. Not sure which options are deal breakers for you.
Good luck with your search