I've recently joined the Nisi clan and am an authorised reseller here in New Zealand with the best prices anywhere for these filters at present.
I have only incorporated the most useful and most commonly used filters on my page. Nisi make many more, including great screw in filters. All of Nisi's range is available through me, except the V2 Holder System which is being phased out in favour of the V5. If the filter you're after isn't on my page, please enquire. All filters are available via Paypal, credit card or NZ bank transfer. Tracked delivery takes only 4 business days unless you buy at a workshop and I have it there with me - let me know!