I'm looking at doing this through Investnow.
Three-fund portfolio - Bogleheads
Essentially invest in the total us market (or nz I guess if you're nuts), total international and total bond.
I'd look at doing:
Foundation Series US 500 Fund (~45%) - There doesn't seem to be an obvious total US market one.
Foundation Series Total World Fund (~35%)
And I guess this: Smartshares Global Bond ETF (~20%)