When I can't find the exact font (which happens a lot) I start with the closest I can find and then modify it until I'm happy with it. Typically I place the original image in the background of my design program and build the new one over the top so all the layout is correct. Others will auto trace and then clean up the nodes but I find that takes me too long. If you have skills with photoshop or gimp and make the image super clean and straight black and white it will auto trace better. Text rarely comes through good though and that's why I prefer to just build it from scratch. This just one mans opinion.