A little searching in the archives turned up the German website:

http://www.agkkk.de/

BUT, it looks like they've been taken over by Borg Warner Automotive. The URL I posted below will take you to the webpage with links to info on their turbos.<ul><li><a href="http://www.3k-warner.de/english/homepage/homepage_e.html">KKK Turbos</a></li></ul>