Where are you getting your quotes from? There is a shop here in Huntsville I have used that is very reasonable and quick. None of my jobs took longer than a week. Their name is Aerostar and their phone number is 256-534-7535.
I don't know what the differences between the years might be but I can't use, what I believe is the stock, license plate bracket on my 78'. It is a simple L bracket with two lights that was bolted to the frame. If anyone can use it let me know.