There was a 'project' a few years ago by several people to gather as many recordings of the Child Ballads as possible.... obviously a close to impossible task. I think the project ran close to 9,000 items and over 50 gigabytes. Since these were 'commercial' recordings, there were many liberties taken with standard, traditional tunes..(which is, of course, how traditions develop.) There are explanations on the site (click on 'services') explaining sources and giving lists, but no tunes are posted.