Try this number

09 818 7816

Harre B & D
527 West Coast Rd Oratia Auckland 0604

https://whitepages.co.nz/w/harre-david-barbara/

They may have Brian's number.

https://whitepages.co.nz/w/100797876/

Brian Stuart Harre, only three "B" Harre's listed. Only 79 Harre's listed for all NZ.

***

Also from a search on the net

May be old - posted 2005:

Harre & Co Ltd
PO Box101-883 NSMC Auckland NZ
harreandco@ihug.co.nz
Tel 64 9 415 5629