Im also looking for an extra back seat, I want to put the swiveling front seats from peugeot 806(or similar) in front, and to make up for loss of one seat, put one swiveling seat in the back. Im not sure if suitable mounting points are retained in the scudo though.
Im also interested to know how hard it is to put in seats from an unrelated car, such as the ford galaxie, renault espace or whatever as this might make it easier to find some cheap and in good condition with nice upholstry.