I have a copy of the Aero Register back from when the site was active, not a definitive answer but it would help shed some light on numbers with the VINs that are logged (well certainly with the minimum figures).
The register copy I have from Feb17 has the following logged:
Series 1 - 280
Series 2 - 115
Series 3 - 192
Series 4 - 179
Aeromax - 104
No figures on Supersport, Plus 8 or Series 5 though..
