I found this video of Vigo talking about byssus. It is in Italian
http://www.comune.santantioco.ca.it/cms/il-bisso.html
If the questioned Veil is not real I am more inclined to think this was commissioned in secret by the Pope or some other person with money to help perpetuate the story and then it fell into the hands of the church in this small town rather than it is a costly fabric sent to Durer.
I do think it is significant that the Pope went to view it and prayed before it. Don’t know what it means but I think it is significant.
http://forums.catholic.com/showpost.php?p=3776122&postcount=9
Interesting post about the use of the word Byssus.