The Sylvania SilverStar 9003ST is probably your best bet. They are readily available at places like Autozone and have been reported to look very good.

I personally went with the PIAA "Super White Platinum #15680" 80w/80w which are now sadly out of production, had to find them on Ebay. From posts here in the past, I get the feeling that the SilverStars are the next best thing and they are both cheaper and a heck of a lot easier to find.