Does anyone know how i can get a kold of keith urban?

Ok I need to get a hold of him because i need his permision to do somthing. The reason why im asking is because i need his permision to do something. The thing is, I'm into making things out of fabric and i wanted to blow up a picture of keith onto a t-shirt, parts of a quilt or a pillow and sell them. my dad told me i had to have permision to do it thogh. Thanks for your time! -Jamie