Have found the deaths for Leslie Charles Laver
1980/43576 Laver Leslie Charles 7 July 1911
and for Janet Pollock Laver
1992/46721 Laver Janet Pollock 8 November 1910
In the electoral rolls they had a son Leslie Charles with them in 1969 then in 1972 & 1978 he was with his wife Katheen Alice, i havent found any deaths for them.
I have just checked the whitepages (www.whitepages.co.nz)and
there are only 9 Listings in NZ for Laver, one of those may be able to help.
I will keep searching and update if i find anything else for you