According to Aero 8 A Brave and Exciting New World, production numbers are as follows:
S1 214 (i thought this was much higher)
S2 60
S3 208
S4 178
Aeromax 117
Supersport 132 upto jan 2013
Aero Coupe 10 upto jan 2013
GTN 11
Plus 8 98 upto jan 2013.
So probably well less than 2000 with the balance of production supersport, Coupe, plus 8 and S5.