The probate is here:
https://familysearch.org/ark:/61903/3:1:3Q9M-CSZC-2SNC-B?i=350&cat=2278074
Unindexed probates are searcheable in the Family Search catalogue, using the Archives index numbers.
Superb searching John

Probates less than fifty years old (i.e later than 1965) aren't supposed to be viewable online. Both Archives NZ and FamilySearch state this explicitly. Certainly admire what you've managed to do.
Is your search method anything like the following which will get you to the same end result
but will only work if there is an associated camera icon.---
The following link will take you to
"New Zealand, Archives New Zealand, probate records, 1848-1991"https://familysearch.org/search/catalog/1865481Scroll down to, then click on, the relevant district.
Scroll down to the corresponding year/record range.
If there is a camera icon, click on it. This will take you to the associated images.
Double-click any image.
Click forward/backwards arrow to find relevant image.
Regards
Beg