i always buy mine online from the same place. cant be bothered waiting for new zealand catch up with the rest of the world. postage is a killer, but better than having to wait for something that might not show up. they dont have everything in stock right now, but you may be able to fill a few holes. i messaged them last night about the next wave and they are expecting news next month.
http://www.toottoottoys.com.au/collections/thomas-minis
http://www.toottoottoys.com.au/collections/thomas-minis
my website address has changed: https://sunscollections.weebly.com/