Depending how flexible your 'under about' is, the Elddis Xplore 452 may be worth a look.
MTPLM 1165kg - MiRO 988kg
Perhaps too high, but a cracking two-berth with a big rear bathroom with a good shower and wardrobe in it.
We love our 2011 model, bought early last year.
We were initially looking for a 302 (as suggested elsewhere in this thread) which is a smaller 'van, but a nice design, but this one popped up a few streets away at a very good price, and we couldn't resist!
Good luck anyway.
(edit: What are you looking to be towing with BTW?)