Baggage Door Option ?
One other option I have seen used is the removal of the baggage door on a Cessna (172?) with the photographer sitting along the floor and shooting out of the door.
There is a Sydney based photographer that takes a lot of sailing photos off the coast this way.
I assume that the approvals required are the same as a door-off but it looks like it would be less distracting and noisy up front. And you probably need to do a bit of surgery with backseats etc to make some room.
Does anyone know anything more about this option ?