While looking for wheel well liner with vents, here's another mod I'm looking for: center bumper air duct.
I contacted Z1 to see if they can get something that fits the 370Z. Hopefully it doesn't look too tacky.
[EDIT] Z1's response is none available, but there is no guarantee of this one fitting. I requested measurements if they have one in stock. It would need to be flipped upside down to follow the contour of our bumper. If all else fails, I need to find another solution (some sort of box with trim bezel to hide the cut out).