I'm not sure a template exists. If it does I have not seen or heard of it. If you want to repaint the red circle use thin electrical tape on a warm day. It's much easier to turn corners with than paper based masking tape.

I took all the dead paint off of my hubcaps and had zero luck trying to mask the black parts off around the outside. Not happy with my painting results I went and drew up a cad file of everything and then had black and red decals cut from sign vinyl on a plotter.