Couldn't help myself so rang the Sydney Duty Free store for you.
Basically they are selling the iPad, but have no stock because as soon as they get stock it goes.
The lady said that they will not hold one for you and they do not do telephone sales. The iPad also is not listed on their website because they can't match demand reliably.
All said and done, it is simply pot luck whether they will have any when your friend passes thru, but worth checking all the same.
To find pricing just google aussie ipad prices and deduct 11%.