A sausage roll perhaps???
No sorry I can't think of what it may be, I've never heard of it.
ETA - Just googled it. The only thing I found was a website for Fraser Island and a link for some cheese place who have a swagmans roll. So possibly it has cheese in it.
I'm still looking though because I'm intrigued now.
ETA Looking at the menu for the cheese place. Their swagmans roll is just a Ham, Lettuce, Tomatoe and cheese roll - Not what you're looking for.http://www.cheesedoffcafe.com.au/newmenu4.pdf