Maybe a stupid idea but can't you write to Susanna so she can give you name
of scholars in Western Armenian?
She is not herself a third-party (and not a scholar in Armenian AFAIK) but
she can probably provide the name a third-party.
PS: Oliver you link doesn't work, I've got an error 404 and I don't see
"Western Armenian" in
"Armenian", "Amernian, Classical", "Armenian, Middle"