Forgot to mention that it is an OTS or a roadster. The only ones I have seen are the very heavy (3.5 inch pipe that is full width and braced with a long diagonal reaching far back into the boot.
I was looking for something a bit lighter ... with a hump for the driver and another for the passenger...
I had a good look at the car and think I might be able to make the one for the Miata work , but it seems a little too light perhaps... I would appreciate your opinions
Dave