Well, I changed course on my 2010 X5 35d and decided to keep the black bumpers and modify the tow hitch around that. So I never mounted the aero kit that I'd already had painted titanium by a well-regarded shop (they do work for Crevier BMW).
The kit is brand new and flawless as it's never been mounted.
I'd prefer to find a southern CA buyer to avoid shipping, but I realize the odds of that aren't great. I'm asking $1250 for the full kit which saves you a little from the cost if you started from scratch for a silver X5.
Attached are some pics. PM me if you're interested or want more information.