I don't guess you have a large format scanner to digitize it and make a clean vector? If you going through all the trouble of hand tracing it to recut it anyway, I might offer the customer this service.
Good point, especially since we are only doing the face that broke, I'm sure we'll be seeing the other side soon.
You can't tell from the picture, but that face is like 6' x 14', so what I would probably do to digitize it is to take a straight on,
close picture of each letter (except the ones that repeated), create line art, and put them back together....
but the other way, I just pass it on to our paint department and don't have to mess with it