To the best of my research, the rack was standard and came on every vehicle.
Yes best info is to contact the appropriate official from the listing in the rule book. Any thing you get here will be strictly unofficial (best guess) information.
You might also contact a dealer and find out if at the time that vehicle was sold was that a deletable option on delivery.
On my car the rear spoiler could be deleted when you ordered the car. On later models the manufacturer did not allow spoiler delete so it could change from year to year.
Larry