NX Roof spoilers on ebay
I never really cared for these,and they are probably not OEM Nissan....but if this is your thing....here you go! Not a bad price either
Nissan 100NX 100 NX Rear Roof Spoiler Tuning GT | eBay
Nissan 100NX 100 NX Rear Roof Spoiler Tuning GT | eBay