Retrofit kit w/o halos are $300 and $68 for halos (white/amber). They also have LED strips available which are $25 I think. I wish I could see an actual application of the halos on the FR-S so I can decide whether I want to do it to my ride or not.
Excellent examples (w/o halos):
digital_assassin's fr-s (TRS retrofit kit w/ LED)
colHolm's fr-s (TRS retrofit kit w/o LED)