Where can I download an older AIR installation for linux?

I've tried every place that "says" they have a Debian package for AIR.  Even though the discontinued it, why isn't it archived on the website somewhere? Unless something about how the program operates

makes Linux exploitable..... THAT IS SPECULATION. I don't know if it is, but it makes me wonder why Adobe has left no trace of a way to install it that doesn't involve moving mountains