Hello there,
I'm Bogdan from Romania. I'm a mechanical engineer, 3D designer and modeler.
I could make the 3D model (virtual prototype) of this scissor stair, based on the photos you've attached, but I will need also some dimensions/measurements (if you could provide).
Based on the input files (photos, plans, drawings, etc) I will make a basic model which you'll see and may ask for adjustments, modifications, changes, etc.
When the final model is approved, I'll send you all the necessary files as per your request.
I think will be beneficial for both of us if you may open a msg board here and we'll discuss all the details of this project.
Regards
Bogdan