retrofit question
 

So i have h4 bixenon hid kit. But i need to retrofit projectors in my housing. Question is what projector from anothet vehical from junk yardcan i use with bixenon and can use the 4 bulb. I heard most projectors use h1 or h3 but an h3 can be bored to fit h4 bulb. If so which car with factory projector will work?