Rear entry RVs are not very common so you'll have to do some searching on your own. Bs are fairly easy to find but if you want a B+ you'll have fewer choices. PPL Motor Homes , a consignment lot in Texas, is one place to look -
http://www.pplmotorhomes.com/classc/class-c-motorhomes.php Try Lazydays too -
http://www.lazydays.com/RVShop/SearchResults Two class B+ with rear doors are Trail-Lite Model 211-S -
http://www.chooseyouritem.com/rvs/files/20361000/20361333.html and Born Free Built for Two -
http://www.bornfreervclub.org/bulletin_board/viewtopic.php?t=4176&sid=acf9f27c1434d634df33ab60abf22336
