Not Thundercracker & Skywarp, but I have today received an e-mail saying that they're having difficulty obtaining Galvatron, and would I like to cancel my order. Which I would do in a heartbeat if my local Big W bothered with leaders (and put out some Galvatrons), but they just don't seem to want to.
So I wonder if Hasbro Australia is having difficulty with supplying stock for some reason.