a 9004 hid bulb is an exact fit to the hole for the dtrl, you'd need to use a dab of high temp silicone to actually hold it in or even a piece of extreme temp ductwork aluminum tape from behind can do it, cause the bulb won't actually lock in place, but it will fit the opening perfectly & seal well with the o-ring of the bulb itself.
personally I wouldn't do this on a stock headlight though for 2 reasons, 1 the high temp may start to melt some plastic, that area is not designed for that much bulb heat, 2nd & more importantly, it'll just look like a blinding bright unfocused light, don't think it will look good, more annoying & begging for a cop to screw with you if you kinda blind him... hid's are super bright, but the light needs to be harnessed & focused & directed for it to be usable, otherwise it's just a stupid bright light for no real reason...