For an Australian that grew up with these albums being the "official" AC/DC studio albums, it's strange to be in this current situation were they have now been replaced by the international versions. To put this in context - it would be like if the first half of the Beatles UK catalogue was replaced with the U.S. albums from the 90's on wards. The original UK mixes and edits lost to older CD and the original vinyl. Which if you did want those original second hand discs, be prepared to pay a fortune on eBay. That's pretty much where we are at with the original Australian AC/DC albums. I have never read any official word as to why the Albert Productions albums are now deleted. You can fill the gaps with songs from the Backtracks compilation, but it's not ideal. Surely a vinyl box set with the original albums wouldn't be too much to ask of one of the world's biggest bands?