Tucano Smilza Slim Carry Case 14" $18.98, STM Blazer 2018 Laptop Sleeve 15" $18.98 @ Doolz (Free Collect Auckland, $7+ Shipping)

Store based out of Mt. Wellington, Auckland. 5⭐ Google reviews.

I get $7.19 shipping to the Waikato region. There's also a small payment surcharge. "The charge for using PayPal or a credit card with us is $0.45 + 3.5%." No fee for bank transfers.

Scroll to the bottom of the page to see other available colour options.

There's also a bunch of Cygnett powerbanks on sale.
Cygnett 6000mAh, $18.98 vs. $76 at PB Tech. Don't know much when it comes to powerbanks though, so unsure how good of a deal it is.