This is the Fisher item: A Bunch of Green Holly and Ivy. Blunt has a copy with the same refrain with music. You can search: VWML Song Index with title or RN12 with title. It seems clear that the Fisher text was from "Miscellaneous Field Typescripts and Manuscripts" and not a recording. Every recording may not be on the site yet but if you use the online catalogue that should tell you if there is a recording.
Some items are not listed properly -if you search RN12 Carpenter - not every item comes up. I had to search "True Love of Mine" to find one item.