I was in the same boat as you a few months back. I wanted to keep my 4 lug gram lights so I searched endlessly for the best setup. The only two options I found were circuit sports from phase2 and cross-drilled and slotted brembos from heavythrottle. Unfortunately, heavythrottle closed their doors a few months ago.
Have you considered using 350z track rotors. You can find the in 4-lug here:
http://www.zilvia.net/f/advert....html
^^^They're probably overkill, but they'd look nice behind your gram lights