Be careful as the tail lights changed after 05 in regards to the new tail fairing design... you can match 04 > 05 tail section and 04 > 05 tail light etc... what model do you have?
You'll be wanting the 04-05 version then. I have one, it's missing a piece of perspex from the top (see linky), but works perfectly etc... and could likely be repaired iffen ya can be bothered. I rode with it in that condition for 10 months with a sticker covering it... may yet put it back on and sell the "perfect" unit, not sure yet :dunno
Problem is it's over here (expensive postage), but could make its way there in March. My mother in law returns to the UK from NZ in March... If I still have it and you're interested let me know nearer the time... say 30 quid (inc shipping in UK)???