Did it stay within the same family but change hands? Was it used as a demonstrator at the dealership? I'm afraid there's no easy way to find out the names and addresses of previous owners. If you have some leads in the history files, then you could try writing to past keepers (there's no guarantee they're still alive, living at that address, or will reply). You could try making contact with a the Saab Owners' Club (www.saabclub.co.uk) to see if the car is known to them or they can help.