[MetroMPG]

Hi. I didn't make a template for mine. But it's not that hard to just get underneath the car and figure it out.

The area that needs the most creativity is the rear suspension, since the control arms stick down into what would otherwise be relatively clean airflow. And there's not much distance to taper back "up" before you get to the end of the car. (Plus you don't want to taper up at too aggressive an angle or you cause flow separation anyway.)