"Go Fun Yourself!"

I read this saying somewhere, I think on John Heald's page, and was wondering if it is actually on T-shirts. I would love to have one. Does anyone know if I can buy one or have a design I could use to make my own?

I read this saying somewhere, I think on John Heald's page, and was wondering if it is actually on T-shirts. I would love to have one. Does anyone know if I can buy one or have a design I could use to make my own?

That's the line for the Toyota AYGO 2014 car.