I wonder how close one of those mini-trucks is to a suzuki samurai and if the body could be put on a samurai chassis and titled as an assembled vehicle.
Its a long shot but might work but only really worth doing if you can get the parts cheap enough.(a lot of work)
I kind of thought the mini-vans were interesting also.
Actually just getting a used tracker (stopped making them in 04) and turning the rear cargo are into a mini truck bed would be very easy.
I made a secure box area for mine, its great to be able to lock things up safe and secure.