Just ask the99contour - as he "custom" optioned his former Corolla - he had to go through some hoops to make that happen, in the end, it still wasn't quite right.
Yeah, I custom optioned my last Corolla and waited 87 days instead of the promised 30 to 40. When the car came in, the wheels were wrong. I was so pissed that to get rid of me the Toyota dealer actually drove to Cincinnati, with a car from their lot, traded the car to the dealer in Cincinnati for a car with the wheels I wanted and drove it back. They then put the wheels off that car on my car.
Anyway, custom order is nice, but a Corolla isn't a Rolls Royce or anything, you can get what you want, providing that Toyota actually offers that option. The body kit that the original poster is asking about is exclusive to the S and XRS. It CAN NOT be ordered for a Corolla LE or XLE.
That being said, you could always take the car to a bodyshop and ask them to order you the entire body kit for a S from Toyota, paint it and install it. However, you are looking at paying at least $2500 and more like $3000 for the kit, paint and install being that the car is so new and Toyota will be the only place to get the parts.
IMHO, the body kit on Toyotas is not very good looking and is definitely not worth even a grand, let alone three. If you want the body kit so badly, my advice to you is to buy a Corolla S, option it out and live without the push button start.