Try Amazon. While the user interface isn’t nearly as tailored for industrial products, they will likely have most of what you’re looking for when it comes to basic hardware. Amazon purchased Small Parts Inc. a few years back, and their catalogs entires can now be found in the Industrial & Scientific section.
I have been buying from McMaster for more than 40 years and I seem to remember a time when they had offices all over the world. All the outlets were listed in the catalog. They prided themselves in their ability to deliver in a very short time. However, I seem to remember that international politics and unrest (likely shipping, tariffs and taxes) caused them to pull back to US only. Does anyone else remember that?
According to my interactions with McMaster, they don’t ship to Israel for anyone except a few select companies who regularly place large orders with them. I don’t know anything about their policies for NZ, but I imagine it could be the similar.
Luckily for us, we were able to reach out to one of the companies and piggy-back onto one of their orders for some products that are harder to find here*. Maybe you can try to do the same if there are Kiwi companies with ordering privileges.
We are in Adelaide Australia and we have the same problem not only with McMaster-Carr but with a other US based companies who don’t ship overseas.
Open an account with a trans-shipping company. We use Shipito and we are happy with their service but there are other companies in the same business.
There are different levels of an account from free to paid.
This gives you a number of advantages: a couple of mailboxes in the US where you can send stuff from companies which don’t deal with overseas customers, packages consolidations/repacking etc, usually much cheaper shipping cost than what you get when buying direct.
We use this method to ship our parts from US vendors and KOP items.
McMaster sold goods without promptly disclosing so to the UAE, Saudi Arabia, Oman, Qatar, and Kuwait which does not comply with US export law (selling things to countries boycotting Israel). They were fined and chose to stop exporting outside of the US and Canada.