There is no one outside of maybe the NSA that keeps such save one. That is, many web masters keep old content so if you need it, you take the time to find the web master/owner and ask for the old version.

Most won't reply and I've found folk that feel entitled to the content which only makes matters worse. No one will work with the entitled folk. All this is hit and miss and you have to go with please and thank you and never lash out as well as hope for the best.