I've seen later Passat front and rear leather seats fitted in a Defender double cab, they looked like the sports seats from 2004-2010 model,as I had the same seats in my old Passat, they are quite narrow front seats and looked like Exmoor trim ones you would never know they were from a Passat unless you were told, only hassle would be either working out a way for the seat bases to be removed or a hinge to flip the seats forwards to gain access to the batt box etc.