Depends on what you want out of your van. We converted the front bunks in our little 16' Franklin to an ensuite. As there are only ever going to be 2 of us in it, it worked for us. You lose the couch space these bunks also make, but there is still the dining area seats. We only ever sit inside the van when it's raining anyway, so that didn't bother us either.
There must be a similar design to our van in a modern off roader somewhere I would have thought that would allow you to do this.
Keep looking, there will be something out there. :)

