2013 used headlights on ebay... what do I need?

Hey guys,

Looking at trying to find some super cheap 2013 headlights on ebay... found a couple that seemed like good deals. I know the output isn't as good quality as the retrofit ones, but the truck isn't my daily drive so i think they will do. The ones I have found do not come with any bulbs or ballasts.... my question is can I just buy any HID bulb/ballast setup and run them in these headlights? If so, what bulb type fits in these housings?

Thanks in advance!
Grant

There was a thread on here. A member on here made it work and did a whole write up on here a while back. Maybe someone can put a link to it? I tried searching and can't locate it