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Hello there I'm Scott,
One of your biggest factors on road noise is tires, the tread pattern has ALOT to do with road noise. Undercoating will help some, you can also pull your interior and put some sound deadening material under the carpet that will help also. I hope this helps you out, please let me know i can be of further assistance.
WHO DOES UNDERCOATING? ANY IDEA ON COAST?
Thats defineitly the easiest way to start for sure. I'm here in SLC,ut so its hard to say where exactly for you to go, but most dealers offer it as a addon so I'd give the closest automobile dealership a call and see who they recommend. You could also check some close by Bodyshops, they could also help you out. Thanks for using JA!