I believe these pillows are a bit of an OzBargain favourite! I was doing some research earlier in the year through the forums here and this brand was mentioned quite a few times.
Buy at your local Harris Scarfe store, or buy online for flat $10 shipping. Free shipping over $150 purchases - great if you buy two!
I believe you do need to be a VIP member (Free to join, no voucher for sale required), but there is no membership card and I've only ever been asked if I'm a member, to which the answer 'yes' will get you the discounted price.