Paying to have this done would be a waste, imo. I used the Crystal View kit that I purchased from Advance Auto for $19.00. Over a year later of sitting in the sun everyday and they still look good. Very clear instructions and only took about 20 minutes each side. Take a look at my before and after shots.
http://www.xoutpost.com/bmw-sav-foru...ight-lens.html