The Romanian Repertoire of Pipe Organs, made by the West University, Timişoara is now accessible publicly from the web:

http://www.monografia-orgilor.uvt.ro/

It also points to an e-book with pictures of all of them, and some introduction in Romanian and English. No dispositions, those are searchable online from the site above.

The Lutheran (Evangelic by Augsburg Declaration) community of German Saxons also keeps a more recently maintained directory of their organs:
http://orgeldatei.evang.ro/