Here's some http://www.korea-is-one.org/spip.php?rubrique5 http://www.korea-dpr.com/lib/ From the E-library I would recommend LET US ADVANCE UNDER THE BANNER OF MARXISM-LENINISM AND THE JUCHE IDEA. It is the best introduction to Juche if you want a quick overview.
Where can I find Juche theory in full? Is it on the internet for free or a book?