Just as a suggestion to VI: in case that the sampling of new sounds as requested for in this thread is considered, it would probably make sense to contact
Concentus Musicus, Wien
http://www.kdschmid.de/deutsch/index.php3?ch=3&p=1orchester.php3?k_id=115&tix=
or even better:
Players in these ensembles know how to realize a high variety of non-vibrato playing modes, and certainly own or utilise a wide range of appropiate instruments.
By the way, it might be meaningful to specify the identity of the instruments used for solo instrument samples in general as it is the case with Boesendorfer piano.