This accessory was posted in another thread so I thought I would share it here for anyone looking for a sun shade:
82-11-2-473-374 G29 Z4 Luxury Sunshade
According to BMW,
https://www.shopbmwusa.com/product/8377/BMW-UV-SUNSHADE it only works on vehicles
without option ZDA Driving Assistance Package so that leaves me out. I'm trying to track down the part number for the sun shade that works with the Driving Assistance Package.