there are a few people who have done it. and its wellllll worth it. the cutoff is a lot better and distributes the light better. ive seen them with tsx projectors. i dont remember who did it but if you search around you will find a thread.
Yes, it's depends on which projectors you go with. I have TSX Projectors in mine and the cut off line is very sharp depending on what year TSX because the newer one has a step cut off line. Check out my sponsor website http://www.customlightz.com/ it has the information you looking for and pictures.