I found this firm the other day.  They produce laser-cut building kits in scales from Z to O.  There is a range of Saxon buildings in H0, as well as buildings for narrow gauge lines including the Pressnitztalbahn (in Ne as well as H0e), Zittau and Fichtelbergbahn.  I am very tempted by their (off-topic for ROG) Mariazellerbahn buildings.

http://www.modellmanufaktur-beckert.de/

Brian