GM's RS type Spoiler question.

I am understanding that the RS type spoiler from GM has the two side pieces actually "drilled" into the rear panels. Since this is so, have any of you taken this off and had those holes filled? How much should I look to pay for such body work? Any way to "do-it-yourself"?
Thanks

personally i like that spoiler :) and i got the freedom design 5 " one since it didnt come on my z --- but im sure if you go to some body shops that can give u qoutes and ask them to explain how they are gonna do it then use their idea :P