After I found how to access the mounting points, in the convertible they are under the roof box, unfortunately I'd already removed the rear seats and boot trim!!
Anyway, I bought the top mounts from the Dealer, went to put it on and it doesn't fit, there is an insert in the new mounts that wasn't in the old ones, this is what stops it fitting. Unfortunately I can't remove the inserts.
Here are Pics, anyone know what part I really need?
Shock:

New mount on Shock:

Old Mount:

Access point on cab, if anyone's interested:





