Hattons customers in New Zealand have received the same email so its not confined to just the ATO, the IRD are over it as well. Mark's & Spencer were tax free to NZ until a couple of years ago too.
It's more expensive for Kiwis as our GST rate is 15%.
I've dealt with Hattons for 50 years and have always received excellent service. Their trunk facility was great for saving postage so this is quite a shame.
Regards,
Simon