Thanks for that, Moorganer. I have that site already bookmarked, but if I use the check compatibility function I get this - "This item does not fit Morgan Plus Four 2010 -- [1985-2012] Convertible 2.0 Plus4". I assume that means even when fully depressed the unit doesn't fit under the car - but I'm not sure I can believe that...
I checked several sports cars and it did not suit any of them.