Sylvania Silverstar Turn Signal

I am wanting to clear the corners on my alero but NC does not allow you to take the amber out the lamp unless the bulb behind it will glow amber. I was originally under the impression that the Sylvania Silverstar 3157 model replaced both the front turn signal as well as the amber covered light but upon further inspection I noticed the bulb on the outer-most portion is much smaller than the other 3157 model turn signals. Does Sylvania make a silverstar that replaces this bulb or if not does anyone else that will appear white but glow amber.