Saw one like this in action & was so amazed just watching it I forgot to take pics.
Seems like a great conversion, the wheelchair passenger sits up front beside the driver.
Puch the chair up the ramp, lift the ramp & slide it in to stow then simply close the door. As the door closes, the whole floor swings in.
Have to say, although I was mightily impressed, I think this mechanism is too good to be true & I suspect there will be problems with it a year or two down the line