Recently I have been watching this Youtube series about some surfer dudes travelling around South America in a Chilean camper van. The Bus looks like it is the back half of a split and the front half of a bay. Anyway, it is a great series despite them having to rebuild the engine so many times!! Enjoy :-
it's called a fleetline, basically as you say made from bay/split parts - not to everyones taste but i quite like them, especially the side doors and corner windows.
@rickyrooo1 you see it best on these videos when he is (repeatedly) pulling the engine out.... And according to this... http://www.volksieworld.co.za/fleetline.html it is a "1600" or "Brasilia" ... not a Fleetline!