My '06 Mazda3 GTS sedan needs new headlamps - they work, they just look awful. I've polished them several times but it's getting to where they only stay looking good for a very short time. It has the factory HID headlamps. I can find all kinds of replacement halogen headlamp housings that are relatively inexpensive. I can't find replacement HID housings unless I want to spend a small fortune. Can't I simply move the electronic portion to a new housing? Or are they permanently attached? I've tried to search this forum but the search function isn't very helpful. I would appreciate any advice. Thanks!