Went through my browser history and here is what I found:
Here is a JPEG of the Northern Continent: http://www.serialkiller.org/flow/horizons/nmap_new.jpg
I also managed to find an old (from beta) map of the North Continent. http://home.comcast.net/~greetingsgq/Horizons/NCon.zip
Just unzip it in your map directory. Its not 100% up to date, but it does help!