Here is a site that might be of interest to you.

http://www.mun.ca/folklore/leach/songs/milling.htm

The page that appears is blue and fills the computer screen. However, scroll down and there there be some milling songs sung in Cape Breton. They link to voice renditions of various singers doing them. I realize this is getting far afield from your original post so after this I will concentrate on your requests. Perhaps in a few days after people have had the chance to respond to your requests I'll start a thread to do with waulking/milling songs as they were and are in Scotland and Nova Scotia. Thanks for your patience, Jack.