Rear diffuser?

Are the dimensions of the rear diffuser on the later cars ( 11 rear fixing bolts , larger number plate plinth , smaller rear grilles ) the same as the cars before the MY08 ones ?

I think they are different. I seem to remember speaking to my local lotus stealer and being told that there are 3 variations of the fixing bolts depending on which year car you have.

Yeah think my first Exige had 5 rear bolt fixings then the my old S had 8 then this PP has 11 .
The fixings are not the problem as I can get them to make a carbon one blank and I can drill them , it’s the size of the two side sections , if they have changed with the smaller back grilles .