Sorry, no link. Just a screenshot from my Woolworths weekly specials newsletter.
Offer is valid until 04/10/2016. Stock availability may vary by store.*
*20% off $30, $50, $100 and variable iTunes Gift Cards on loads between $30 and $500. The minimum load for this card is $30. Limit of 5 cards per transaction applies. Apple is not a participant in or sponsor of this promotion. ™ and © 2016 Apple Inc. All rights reserved. While stocks last.
Officeworks always have these for 20% off including free delivery to your door.