Finding the Tararua's northern-most #orangebucket hut

I'm seeking out the northern-most Tararua hut in need of GWBN's orange hut maintenance buckets, North Mangahao Bivvy! I'm also looking for the northern-most Tararua hut, Punga (Miro Valley) Hut!

I need a driver, reach out if you're keen for heaps of bush-bashing and hut caring! NOTE this trip is moderate to expert difficulty with plenty of off-track walking.

I will give you free brownies if you can tell me which is which?

(btw it's none of the below huts...!)