Does special software exist that can aid in helping revive an old website from 2000? Can special software help an archive.org webpage come back to life if there are several parts of it that arent working properly? What can make a page show all the original content?
Usually websites are served up directly when you access them from the company. If the company changes something and no external crawler service indexes it, it's not going to exist anymore. So if you want a specific shred of information off of it that's not on archive.org it probably doesn't exist.