On this page of the Council of Europe you can find links to Dick Marty's Report on organ trade (preceded by a draft resolution) and an explanatory map.
The main new element seems to me that he lists a whole range of places in Albania that should be involved. This way he discards previous arguments that saw organ harvesting as improbable because the yellow house near Burrel was such a remote and illogical place to do such a thing.
The report refers to two leaked German intelligence reports (in German!): one is Operationalisierung von SSR (Security Sector Reform) auf dem Westlichen Balkan (2007). The other is from 2005. But it is hosted on Wikileaks and it looks like Wikileaks has problems that make it unavailable. Mail me if you want a copy.