Noels have a sale until the 18th. One of the deals is 30% off of all mobile phone cases. I was suitably surprised to find that this includes the official silicone and leather cases for the iPhone 6 & 6 Plus. Good luck finding any in stock in stores, but well worth ordering for delivery or in-store pickup if you fancy a discount over the regular RRP.
Details here - https://www.noelleeming.co.nz/shop/communications/phone-accessories/iphone-covers-and-cases/c11902-cPhone_Accessories-c1354-p1.html - current lead times appear to be ~10 days.