How about a "modified" 4 seater?
Remove rear seats to create storage area.
Lowline hood aka extended 2 seater hood to lower the rear hood height?

PeterJ.......re extra space in Aero Plu8....couple years ago I went to see a Roadster at Lifes.
Lovely car being sold for the owner.
His wife needed a wheelchair so he had got a coachbuilt box made and fitted on the rear, following the lines of the car not just a rectangular trunk.
It was removeable to allow a rack to be used too.
The main thing was it was designed to follow the lines/ contour of the car and looked like a part of the body not a bolt-on.
Something similar would work on your car I am sure.
The lack of " dog space " behind the Plus8 seats is a negative for me...how would I get 2 spaniels in?


Plus Four MY23 Furka Rouge