First person I'd try is zmanalex.
Link: http://www.350z-uk.com/user/9648-zmanalex/
If he can't help then try Clark Motorsport as they were breaking a 350Z awhile ago and then start trying the people in the "350Z parts for sale" section on here were a few different members were breaking 350's.
Like RS Shades, R35LEE and I believe the chubby ninja is also breaking his.