Need a small campervan with 4 seat belts and loo.

Oldgoat

We have a T5 campervan with 5 seatbelts. It's great - apart from the absence of a proper loo. Consequently, every night-time trip to the toilet block by OH is followed by a shuddering crash when the sliding door is slammed shut and muttered curses from his
now wide-awake wife. I have been looking at slightly larger vans which have a small bathroom but none that I have seen have more than two seat belts so can't carry passengers. Can anybody suggest a model which might suit us, please?