Use the photo to draw out the stencil/template for the bail. Consider using the portion cut away as a stencil.
Pro Tip: I prefer to use a stencil, which you draw inside of, rather than a template, which is seen here, to trace designs on sheet metal. When cutting, I cut outside the drawn line. That way, I have an idea of how much needs to be filed away to get the exact design. If I cut inside the line, as would be needed with a template, the design outline would change slightly because it is easier to cut more off than necessary, which might affect the finished project. I then would have no reference lines for refining the edges of the piece.