Stillen have taillights also
http://www.stillen.com/product.asp?id=A ... del=ALTIMA
I don't know about headlights, but I think all the companies get their taillights from one supplier, Eagle something..
I got mine (tail lights) from ebay, still working perfectly!
I don't recommend spending too much on headlights or taillights, there are other things you could spend your money on (exhaust, coils.. etc)
So get the lights from eBay! I think black housing will look good on your AC, but if you want to maintain the clean look, then get the red tails and white heads