I am not sure of this, but I think the rear seat springs of a Tudor will fit. You can iterate the wood seat frames from 3/4" - 1" plywood to fit the your car. The seat back frame is hinged to the bottom frame. The arm rests are the same as in the Fordor. The top row of pictures is the seat back.
I do not think that a tudor rear seat bottom cushion will fit a Victoria because it does not have the cutout to clear the rear cross member. See Bob's picture of the seat cushion.