Try Paintscratch.com. I've ordered a couple of tubes of touch up paint from them.
http://www.paintscratch.com/
Also try our sponsor, Infiniti of Scottsdale. You can find their # in Elwesso and Maxnix's signatures. Finally, since it's Nissan paint, walk into your local Nissan stealership with the paint code and see what they tell you. I got my oil filters through Nissan just a couple of weeks ago. Good luck.