Hi Eileen
You may also like to try the "Mangere Cemetery and Crematorium". They don't have an email facility but if you "google", you'll find their mailing address and a telephone number. (I recently pointed someone in this direction (with some luck) , when they were looking for a burial for a former New Lynn resident).
Hi I am looking for the following death notice.
It is for a Robert William COPPELL died in October or November 1968.
For a death notice look-up, you realistically need to be able to supply the date of death or burial. It would be an enormous task to search newspapers for the months of October and November - even more so with the very large editions of the "NZ Herald" !
If you are unable to find Robert's burial, then perhaps it's worth requesting a look-up of his probate record at Archives NZ Auckland office. This record will have his date of death.
Good luck.
Lu