Somehow missed this post, till today... huge list, checked only Z letter... and would like to correct, that Jozef Zsapka is not from Slovenia, but from Slovakia.
Speaking of the Z-section, back in 2008 I didn't know Brigitte Zaczek, but nowadays I'm sure she still keeps collecting original 19th cent. guitars and currently has like 40 instruments or so - all listed on her page, but I saw some in person. If I recall correctly, she keeps them in very good condition and also let me know her plans to donate this collection to Vienna's university where I currently attend and met her, as she would not like them to end up as mummies in sarcophaguses in some museum. She also lets her students have access to them, which I think is also very nice of her.
2014 Martin Okenica cedar, modern (H. Hauser I inspired)
2012 Martin Okenica spruce, early romantic (F. R. Lacôte inspired)