Retrofit just contacted me and said:
Thanks for the inquiry.
Unfortunately, we no longer sell RIGGS bulbs. If you're looking for a bulb that works well with the OEM Nissan ballast, the new Morimoto 3Five bulbs do:
D2S: Morimoto 3Five (35w) - HID Bulbs from The Retrofit Source Inc
So these Morimoto ones dont work aswell? Looking around for a few easily accessible bulbs that work with the OEM ballast is abit of a challenge, especially here in Australia where everything is overpriced!