Found this at Target Macarthur Square NSW, not sure if it is everywhere.
Cotton Terry Waterproof Mattress Protector now 40% off, not sure if there's an expiry date.
Some sizes also available online:
KB - normally $35 now $21
QB - normally $30 now $18
DB - normally $25 now $15
KS - normally $22 now $13 (not available online)
SB - normally $20 now $12 (not available online)
any feedback about this item?
Edit : Reviews on their site looks good.