This is the closest pattern I could find for that but the rays are smaller for the NE, NW, SE, SW positions.
http://www.craftsy.com/pattern/quilt...-piecing/27067
If you can get your hands on the book "Mariner's compass Setting a new course" by Judy Matheison
http://www.amazon.com/Mariners-Compa...judy+mathieson
She gives really good instructions on how to draft it yourself. Maybe your library can get the book for you or you may choose to buy it with the link I provided.