the friends I'm looking for, Allan & Nancy Pedrera are now based in New Zealand?

Answer 1

Try this link which gives the address and phone number for two 'Pedrera's' in Auckland, New Zealand.

Neither of these contacts may be the person you are looking for, but given that it is an uncommon name and that the Philippino community is not that large in NZ, it may be worth while phoning one or both of the contacts to see if they know of your friends.