If you are interested in a state Tartan, be sure to check out the Saint Andrews society for that state. From my own experience; the Maine Tartan has been copy righted and you can only purchase it through one person for a extremely high price and they want to know what you are making with it (in case you want to sell it, because they could get involved in that since it is "Their" tartan)
Saint Andrews Society of Maine had a close match woven which they call "The Maine Dirigo tartan" I bought 4 yards of it without being a member to make a kilt for my boyfriend who is in a Maine fiddler band. the price was $50 a yard. Never hurts to ask.