The earliest "Scarborough Fair" versions seem to be from Yorkshire (Kidson's 'Traditional Tunes' and Broadwood and Fuller Maitland's 'English County Songs'). Steve Roud's folksong index (Roud #12) lists no broadside version of that. The 17th century version is on a Scottish broadside with no imprint, and there's no 'Scarborough Fair' in that version. It's "A proper New Ballad, Entituled The wind hath blown my Plaid away" (ZN821 in the broadside ballad index on my website = Child's A text).