Check out the 350z items for sale as I know for sure someone has all of what you're asking foe sale as I saw the ad earlier. Can't remember who it was who was selling though, just have a look, there are photo's with the ad also.
I don't know about new ones but there are a couple of members who have pairs of undamaged ones (pre '06) for sale @ £30 to £35 in the 350 parts for sale. I have also seen the small strip rear lights for sale there also but I don't think there are any for sale at present. Maybe ZmanAlex/Clark motorsport may be able to help as I imagine OEM will require a mortgage.
Hey Martin and Heather, welcome to the forum and congratulations on the purchase of your 370, you'll have to create a comparison thread and let us know just what it feels like after driving a 350 for four years.