For recently written (less than 30 years old) tunes that will probably someday be traditional (if I wasn't such a snob, I'd say they were rapidly becoming part of the tradition)...anyway, I'd recommend getting recordings of Bob McQuillen's tunes. He's been in on the New England contra scene longer than most, and his tunes fit right in. In fact, I've heard them played as "traditional" pieces here in the midwest. He's been in several bands, but Andy's Front Hall can let you know what's available. They'll have his tune books, too.