I managed to track down a copy to read.
The information provided on the Aero Chassis cars seems a bit confused.
Morgan Aero 8 Produced 2001 to 2010, no production volume given. So it seems they overlooked the S5...
Aeromax Produced 2008 to 2009, 117 built
Supersports not mentioned at all
Aero Plus 8 Produced 2012 to 2017, 122 built.
Speedster not mentioned.
If the Plus 8 figures include Speedster then the Plus 8 is almost as rare as the Aeromax!!
Does anyone have the real figures for Aero 8 production S1 to S5?