Beloved Leader wrote:
Maybe you could send it to the Permanent Mission of the People's
Republic of Korea to the United Nations.

http://www.embassyworld.com/embassy/north_korea1.html
has a link to the address:

Unfortunately North Korea isn't a UN member and the above page has the
south's mission associated with the wrong country.

The Permanent Mission of the Republic of Korea to the United Nations

The Republic of Korea is South Korea.

Tell them I sent you.

They'll be surprised you thought that Mission belonged to you.

Dennis Ferguson