I purchased these over a year ago with the intention of installing in my D90 to make a better mounting point for a baby car seat. I have decided my original bench seat works just fine, so now these are sitting in my garage.
I have attached pictures of the seats (gray) as well as an example of how they would fit in a defender (picture taken from a former member here). You can see how they would work with slight modification of the seat belt location. The male portion of original bench seatbelts work with the attached female portion of the Discovery jumpseats.
You would need to fab up a custom base for the jumpseats to work but the end result could make this a great "upgrade" for the rear seating arrangement on your defender.
I'm looking to get $150 for these plus shipping. If you are local, so much the better as they weigh 75-80 lbs. I remember paying $60 for shipping but it may vary depending on location. I might be willing to meet up if that makes it easier. Interesting trades may be considered as well.
Please pm me with any questions. Thanks for looking!