**EDIT**
If you have an E91, then you can still purchase the kit used for the E9x, but you'll have to get a different control module (with the ultrasonic sensors pointed toward the rear of the vehicle and installs at the rear of the FZD dome/map light assembly)
Found what I needed on eBay: PN searched 65759260874
Does anybody know where I can get the correct dome light cover? I have alarm system pre-wired (MY08 E91), but it seems that the slits in my cover are not-functional.