@Rhaven Blaack provided me with a big bag of reference material (thank you very much!
) which gave me some ideas to flesh out the cars. I noticed a roof support (two beams) inside the Sandman car and two triangles on the front window of the Solar car which are used in only one episode. Obviously the seat configuration of the Solar car changed during production. In the pilot episode there are four seats and in the regular episodes the two rear seats were replaced with a bench, obviously done for filming reasons in order not to hide any passenger behind the front seats. So the passenger could move position towards the middle and the camera could record everyone in one shot. This will give you some display options. In addition, I have found three more items which might come in handy for a little Logan's Run display which I have put on my list. The first is the bombing shelter sign and the second is Rem's suitcase. The third is, well, something special which immediately grabbed my attention because it reminded me of a robot from another franchise. Stay tuned!