Just noticed that Shaver Shop have a few deals on their website but the best appears to be Fusion Power blades (8 pack) for $19.98.
If you can't find a store with them in stock you can order online for an additional $10 delivery.
Still works out pretty good price-wise.
Also you can use Fusion Power blades in a regular fusion handle (they just cost more and are a different colour).
The deal is in their catalogue and ends 29 June. But please note that these are imported products for other countries like Ireland/Vietnam not Australia. So quality will be different.