Is this possible? I'm sure I read somewhere that it's the dealer that adds the spoiler rather than it being added at the factory. Initially I thought no, no cup spoiler. But having seen one today in the flesh I thought it was quite cool.
Same as you I am sure it is the dealer who adds it when it gets to them, I didn't order mine new so I can't be 100% sure but it is certainly something that can be done when it gets to the dealer. I would ask the question, you may be surprised. If they say it is not possible then you can always have it added once you take delivery.