The version in the DT is obviously an Australian remake ("dingos in the hills") and the date is probably post-Sorrels.
Cynthia McQuillin (prominent filker) wrote parodies of Child ballads among others. Her tale of Gilda and the Dragon is an example. Dragon

But is this one by McQuillin? The site where I found the poem only attributed it to her. The title (Grisly Bride) I put on it may not be correct. More info, anyone?