Eriba Puck, 5ft 5" & Eriba Super Puck 5ft 11", the larger Eribas are all 2mtres wide which is just over 6ft 6". The Dutch Kip Kompackt is also less than 6ft wide but not many about in the UK. Freedom caravans are 2mtres as are the current Trigano poptops but worth looking at older poptops, Rapidos etc that might be under but at this width it will be a small caravan.
I can't remember our dimensions but I know ours is very narrow. So if you're looking for new/newish look at Trigano Silver models or for older models there's the likes of our Fleurette or Rapido.
Or perhaps consider a folding camper?
Good luck finding what you need.
------------- Excitedly making camping plans for this year.... just can't make up my mind at the moment!
We have a Trigano Silver 310TDL, 2 berth with 'L' shaped seating, it's 1.8m wide - around 5'11". With toilet, basin, hob & fridge & we love it! Don't know where you live but try this website - Linky
Lots to see, we bought our last 3 vans from them, very helpful people.
Have a look at the pic on my gallery.
------------- Harvey 15.8.1995 - 18.11.2010. Run free, sweet boy x