You might want to contact LeClerc, the top manufacturer of looms.  Also check
past issues of "Handwoven".  And if you've got the time, let "Pieceworks" know
you're looking and their readers and writers will have lots of info.
"Pieceworks" is a magazine about the history of handskills in general.  If you
are interested in natural dyeing, contact Mountain State Art and Craft Fair,
at which there is a demonstration every year.  They will give you the name of
who has done it recently.  Actually, there is so much info, it would help if
you could be more specific.