I doubt there is much in the way of weight difference. We don't build that in a kit, so you'd basically just be ordering raw materials. We could theoretically build those and ship them but I'm guessing it would be a lot cheaper to build them yourself to match.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).