I wonder if this would be closer to the mark for you surrealised. In addition to that 7" single mentioned by stuartrb, there was also a 12" vinyl release in 1984 by Angela Webber via her comedic alter-ego, "the anarchic punk pensioner", Lillian Pascoe. This might be more the one you're thinking of.
Artist: Lillian Pascoe & The Axle Crew
Format: 12'' Vinyl, Limited Edition
Label: ABC Records
Country: Australia
Year: 1984
Tracks:
A1 Lillian's Lunch Rap
B1 The Pascoe Tapes (Live)
I can't help with the single, nor can I find a sound-byte or mp3 anywhere for you to check it out. I'm not familiar with the recording - this is just info I've found on an Oz music database.
Cheers