If you don't need the sign ASAP, the craft fairs usually have some good sign makers. The first big fair is Memorial Day weekend (Sat. - Mon) in the Mills Falls parking area in Meredith. There is an excellent vendor J. Peter Signs
http://www.jpetersigns.com/ located in the White Mountains. He always has a display at the July & August craft shows at Brewster Field in Wolfeboro. You can see examples of his work on his website. They are truly works of art! Checking his website, I see he will be at all 3 of the craft shows I mentioned, the first being the Meredith show May 23-25.