I looked on the MyNismo Factory parts section for the 350Z and there are 2 sections Composite Assy and Composite headlamp. Then under that there are with and without xenon headlamps.

All I need is to replace my driver side platic piece because it is cracked. The lights are still good. Do I need to order new lights as well or can I just get the plastic part.

I have a 2003 Enthusiast.

 

You need the headlight assembly, not the full headlight. It will include everything but the HID ballast and bulb.