Can someone measure their rear deck for me?

[Kroggers]

My Boxster is in the body shop and I need some measurements from it

Anyone here kind enough to get some simple measurements for me? What I need to know is the width of the rear trunk cover at the end closest to the factory spoiler.

I am having a new rear wing made for the racing car and they want to know the distance between the two vertical mounting points for the uprights. I want to mount the spoiler as far back on the cover as possible where there is good structural strength.