These insulated steel garage doors have a custom carriage style overlay. This is a great technique to get a more customized look, and still have the lower maintenance benefits of a steel door. A door like this can be less expensive than a wood door, so using a carriage style overlay on a steel door is a good way to give the appearance of a wood carriage door and still stay within the budget for new doors.
You may also want to see these doors. They were also done using this method.