The majority of fivers built in the US are 96 inches wide. Very few are 102 inches and too big and expensive. But it is also true that very few are narrower than 96 inches. I'm not clear on what the width restriction is for NZ? You might look at very small toy haulers rather than bunk house models, then you could configure the rear of the trailer however you want once in NZ.
Larry Day, Texas Baptist Men volunteer
'13 Silverado LT 3500HD D/A CCSB 2wd, custom RKI bed
'11 Crossroads Cruiser 32MK loaded