Went to Coles (WA) today and found Finish dishwashing tablets 1/2 price.
Several varieties including Max in 1 48 pack ($13.49 instead of $30.79) and Qantum 40 tabs. Possibly others as well.
Unsure about the expiry date or if nation-wide but it is online as well.
Not as cheap as grey imports but as stated by many on ozbargain, they wash much better.
Its on the front page in current catalogue 50% off. Runs out Tuesday 1 July
http://www.coles.com.au/catalogues/weekly/current/c-nsw-met/…