Darkzide, not being an ***, I am trying to tell you that I found it right away. I mean to be very honest with you, no need to start name calling. You have to have a little imagination, if you see it in 20", the wheel design is not going to change in 19". Most wheels though with a lip in 19" for the Z are going to look very strange and smaller on the z with stock suspension. I am warning you now.
Here is the link I found on google after a quick search:
Venaci Wheels Nissan 370Z Project Car.
Trust me man, I NEVER tell people about the search button, but in a case like this it truly took me 30 seconds at max.