One sunday morning browsing e-bay, I found some W126 seats in great shape. They were black leather, and since I knew that a friend of mine had a backseat for a S123 in black leather, I bought them.
The picture above shows how this looked. The seats were nice, thet fit in a W123, but the stitiching is wrong.
Fast forward some months, and I found another complete black leather interior in Norway. I bought this one as well and installed it in the car.