Older materials - no longer accessible (WHY?)

I use a lot of older CS Principle materials in my class, or I have in the past, and now I see they are no longer available. Is there any way I can access this, for example, Lesson 4: Controlling Memory with Variables is a lesson I use to reiterate what we learned in the current year’s variable unit. I really wish these were not taken away. I have a lot of older things from code.org I used in the past that are now gone. MadLibs is another one. There are a lot of newer lessons I’m not a fan of and would love to make my own makeshift curriculum through code.org’s site from all of the great resources that code.org has made over the years.

@joe_padon I will pass this info on to the curriculum team.