Sprocket
I also haven't heard of any being scuttled. In fact, can't see how they would have been apart from being broken up first, taken out to see and thrown overboard.
But from any research I have done, I thought most were taken to airfields like Oakey and Tocumwal as mentioned above.
Interestingly, I can't find any photos of Beau's after the war but need to have another closer look.