Do you already have a soccer graphic in mind? If so do you have permission to use it? You could create your own. Someone with Corel Draw or similar software could create it for you. Once you have done that, getting it onto the side of a computer should be easy. Heck, it was created on a computer in the first place.
All you would have to do then is provide the image in the proper file format for the applique. If you really want it, research how to create the graphic and then find someone to put it where you want.
Do you want something in "lineart"?