No need to go landside.
The ladies at the Koru club are wonderful but thanks to an appalling management decision they've been stopped from doing BPs and bookings.
And you can't get an NZ BP in, say, LAX - even if you do, NZ in SYD won't accept BPs printed elsewhere.
So, regardless, you have go out and join the unwashed mob at the queue for the noodle bar - which isn't really the queue for the noodle bar but for a tiny transfer-desk hidden behind the overcrowded SYD retail area.
A wait/scrummage of 30mins is routine, and watch them carefully as the staff are not the greatest (on loan from QF I think) and they're prone to make mistakes. Also they waste your time with useless questions about your onward journey and may want proof you'll be leaving NZ so print out your departing E-tickets.