For the rear, I suggest this. Can be mounted on rack or fender mounts. I have one on my beach cruiser and it looks great! http://www.somafab.com/bulletlight.html
Not sure what you should do for the front. Soma also makes this: http://www.somafab.com/light_torpedo.html It's not quite as nice-looking though. It's chrome colored plastic. The rear light has an aluminum casing.