I live in Wanganui. I have been to the local Heritage Library and looked up a card index of entries relating to newspaper entries.The following references are there relating to the Goaters.
Elizabeth Jane Goater D Dec 21 1986 88 years
George Henry Goater D Aug 8 1936 66 years Living at Rapanui Road Wanganui. (this is near Westmere , about 8 km out of Wanganui.)
G H 's son Claude Roland
C R's son James Henry
Others related are
Barry )
Clarice
Steven
Bruce
Bruce Jr (Bruce's son)
I went and saw Bruce Jr who said that he didn't think any family tree had been done,so he sent me to Steven who confirmed that. Bruce Jr is going to England in June this year.
Those names listed above Steven are all deceased. Steven told me that he believes that there are only about 8 Goater families in NZ and all related. You can get copies of the newspaper cuttings about these people by e-mailing a request to the Heritage Library ,Wanganui. Google it. Hope this helps.