I have never seen those used in a retrofit but honestly I dont like the look of them, I cant tell if they are a bixenon projector or just a projector with a movable shield (like a bixenon) but still use stock bulbs... They dont come with ballasts and say what size bulbs you want.
If you want to make your own set up I suggest using a clear housing and the retrofitting a set of TL projectors in there. TLs will blow those projectors away in every way possible. Read around on HIDplanet.com or other such sites and get an idea of how much work it will be and prices. I havent been in the retrofit scene for a while now so I cant be sure on prices. There are other projectors out there that will be good too but you cant go wrong with TLs