Zmanalex should be able to help you out with these parts. Just send him a PM asking & maybe a link to this thread to make identification easier.
Link: http://www.350z-uk.com/user/9648-zmanalex/
If not then try one of these two (R35LEE & Shades RS) as they are both breaking 350's.
http://www.350z-uk.com/topic/63996-2004-350z-breaking-all-parts/
http://www.350z-uk.com/topic/87886-53-nissan-350z-gt-breaking-spares-with-20-khans/