This hunt goes on and on - I always open it, hoping someone may have found a clue to it, and then maybe have another look around for a lead.

This could possibly be one, though I suspect it's a dead end. In a discussion on The Poetry Library about this quote I found this suggestion:

Father's family remembers it as probably from "Melluish Bros. A Fruity Melodrama" (Only a Mill Girl or The Doings at the Hall) - Bobby Comber, Robert Treddinick, Fabia Drake, Fred Douglas and Alex McGill, Recorded in 1936
Rilke M

And when I googled that title up came this playlist of an Australian radio station for a day back on September when they included that recording, giving details as

Melluish Bros. A Fruity Melodrama (Only a Mill Girl or The Doings at the Hall) - Bobby Comber, Robert Treddinick, Fabia Drake, Fred Douglas and Alex McGill, a (Recorded in 1936)
"Those Wonderful Thirties and into the Forties Vol.2" Warner 8573-85029-2 9'

Maybe someone can follow up that lead. It might turn up something of interest in any case.