Many years ago I had a TR3 that had a tonneau cover that would go over the seats with a middle zipper so I could drive with only the drivers side exposed If I didn't have a passenger. It attached at the front and back. Has anyone heard of a company that might be able to have or make one for a two series convertible? The one I had in the Triumph had snaps but velcro would also work to hold the cover in place as well. It could be vinyl to keep the cost down but other leather or leather like material would be acceptable. It was great that I could leave the top down and zip closed the middle and close up the car to the elements for a short time when parked out of the garage.