Yep, as they said you can do them yourself pretty easily and cheaply. Don't be intimidated, it's really isn't difficult at all. I used VHT Niteshades to do mine and love them. My process went something like this....
* Very light wet sand w/ 2000 grit
* Thorough dry and wipe down with rubbing alcohol
* Three light coats of Niteshades with 5 mins dry time in between
* 30 mins to an hour dry time
* 4-5 light coats clear with a heavier final coat
* Let dry at least overnight before handling
* Hand polish with Mother's Ultimate Polish and then wax with whatever you wax your truck with
The video that I went by on Youtube called for a light wet sand after they were done and dried overnight but before you polish. I tried this on two of the lights but had a very, very hard time polishing out the sand marks by hand. I would recommend that you either use a powered buffer or skip this step entirely. I skipped it entirely on my third light and it turned out just as good as the others. If you do sand after they are cleared and dry, I would use 2000 grit or even finer if you can find it, like 2500 or 3000 and sand very lightly. Just make sure you have a fairly clean, wind-free place to coat them and you really shouldn't need to sand after anyway. Also, here is a link to my thread with some pics.
If you just don't want to do them yourself you can also buy them already done from a couple of places. There are a couple of guys on Ebay selling them and you can get them from Jeremy at Retro Shop. I personally have bought headlights from Jeremy and highly recommend him.
Jeremy's Retro Shop http://shop.*************/
Ebay (one of them) http://www.ebay.com/itm/2009-2012-Do...c40fd1&vxp=mtr
The Retro Shop lights and the Ebay lights are done by mixing black automotive paint with clear coat so the coating will likely be of better quality than Niteshades and last longer, however, myself and many others are satisfied with Niteshades and the cost is roughly $40 worth of materials vs. $175-200+ for the purchased lights.
**EDIT: Not sure why the forumz filters Jeremy's site but just Google "mcfails retro shop" and it's the first response.