If you do a search way back you will see I offer this same service. I didn't get too many people wanting it at first, but when I had 4 sets of headlights at a time, it burned me out.
I was charging $100 for the labor. You also need to make sure you sand off the outer edge of the inside of the lens. Unless they have a Silver contour, it will look kinda funny with that little silver painted strip.
I'm still doing them, but in VERY limited quantity. It's a case by case basis.
Good luck!
