http://www.ozzytyres.com.au
I've never purchased off them (and have no affiliation whatsoever.....) But thought I would share the discount code "EOFYS" which gives an extra 15% off prices until midnight this Wednesday.
Link to 235/45R18 tyres http://www.ozzytyres.com.au/store/tyres ... iameter=34
Link to 215/55R17 tyres http://www.ozzytyres.com.au/store/tyres ... iameter=35
(I believe they might "parallel import" some of their tyres? They sell some decent brands eg. Dunlop, Michelin, Continental, Pirelli, Toyo etc.)