I was really pleased with the leather splats. If you are going for a classic/vintage look, then they are a great alternative.
I would highly recommend getting them custom made so that they fit your guard shape and soft top mount location perfectly.
Mine had a thin foam backing and edged. Attached to soft top mount at the top, used a short strap with press stud to attach bottom to the chassis. Then just velcro to attach inside the wheel arch.
They are also really suitable if you want to retrofit as they are great for covering up existing stone chips & marks.
Just pop them off when you are washing the Cobra.