I have been trying to find a solution for the noise on the passenger door when going over 65 mph (of course I could stop at 60 mph but who would do that with the Stinger?

).
I have a rattle kind of noise going over 65 mph that gets louder and more consistent as the speed goes up. You can hear it here (sorry for the road noise):
It seems that the noise is coming from the top corner of the passenger door close to the B pillar (between front and read door).
I already took it to the dealer and of course they said they couldn't find it. Any suggestion on how to fix it?
Thanks!