Factories tend to change plans from year to year depending on demand. I remember something similiar, because it was a great use of space. But can't recall the mfger.
Sandpiper does have a nice bunk room with 1/2 bath on the side. 355QBQ
Cougar has an even nicer bunk room with oversized double bunks and a trundle. 298BHS
http://www.keystone-cougar.com/index...t&model=298BHS