That's why Aston has a department called "Q" for concerns like your sunroof, they will solve it all..Selling volume is what gets other options onto any car..volume doesn't sell , don't expect to get those options or even that car on the line-up for long(Rapide S sales in Cali saved Rapide from going 6-feet under)..I'm sure I don't need to teach you this, seem intelligent enough to know about supply on demand..
Sure spec'ing your car out with Q in Aston will cost much more than the sticker price...but if you wanted and could afford a 200K sedan, whats an extra 10-20K for a sunroof/panaroof/glass roof done through Q of Aston Martin?