Available on Blu-ray
Emperor of the North is now available on Blu-ray since September 8, 2015. Though currently out of stock at Amazon.com, it is available from Twilight Time.
At the Twilight Time Wikipedia page it states, "Unlike [manufacture-on-demand], all Twilight Time titles are fully pressed DVDs and/or Blu-rays from a restored transfer. All titles are limited editions with only 3,000 units of each format created, and will not be repressed once they are sold out." So, if you want it you better buy it now because they aren't going to make another run of them. However, it is still available on non-Blu-ray DVD.
http://www.twilighttimemovies.com/emperor-of-the-north-blu-ray/
http://www.amazon.com/s/?url=search-alias%3Ddvd&field-keywords=Emperor%20of%20the%20North&tag=imdb-adbox