If you are just looking for some personal stash, and a very early finish you might consider Early Grizzly, Iranian Autoflower (not a "true" autoflower..it's clonable) or Hasha from Richard Williams seeds. The Early Grizzly and Hasha can be had at Hemp Depot. The Iranians are a Doctor Greenthumb seed and work quite well too.
Or, as has already been suggested give Getaway's seeds a try. If they grow in Maine, they should be able to handle tough weather.