Harry Potter Movie Collection Question

So I love the Harry Potter movies and really want to buy the bundle from iTunes, but one of the reviews says that the new 4K thing does not have the extended versions of the movies. I would really like to get the extended versions (as much of the movies that I can have the extended version for), but I am wondering if this is correct. If I buy the HD or 4K or whatever, will they be the extended versions or do I have to buy them separate? and if I buy them separate, can I "complete the bundle", like you can when you buy a song from and album and then decide to buy the whole album at a small discount?

Thank you!