I agree that top idea is cool. The top was never sold, I believe this was a one-off. That car was a heavily "scooped" Perry D which is on a full-length VW pan. I'm really not a fan, the lines are just all sorts of wrong.
For anyone that wants all of the modern conveniences with the manual operation of a Speedster top just needs to get a new Porsche 718 Boxster Spyder. The 718 Spyder is near the top of the model lineup for the 718 series and features a manually operated folding top, albeit, easier to put up and take down than one of our Speedster tops. I just delivered another one of these today and they are are dream to drive.