With my limited knowledge of cars, be brave and try a scrapyard. When we were sorting the car out for Mongolia they were a godsend. Really cheap, although we did have to remove most of the stuff we wanted out of an old mk3 fiesta ourselves. PS. didn't really know what to expect of the guys who run scrap yards, but out of the 2 we went to, one guy was way toooo helpful and enthusiastic, and the other ones were just generally nice and helpful