Probably a Model 24 which does 4 horizontal. They are rare but I wouldn't doubt them being out there. Also could be digital, some of the newer digital setups have strip configurations in several variations. There is also a model 34 that allowed the customer to select I believe 4 square or 1 large.
As far as making a model 9,12,14,21 ie. normal camera, do that you would have to do some serious and I mean SERIOUS modifications to the camera. I am a former photobooth camera technician and I will tell you now that they can be very particular. Just for starters you would need a light stand to get everything lined up and focused. Not to mention the frame size problem.