Looking for archived websites

I’m looking for some old websites, and The Wayback Machine(archive.org) doesn’t seem to have them on file any more, although they did a few years ago. Are there any other websites that archive old web pages?

there’s a firefox addon … called “resurrect this” … download/install addon in firefox-browser … call up certain webpage that used to exist … maybe now has 404-error or similar. then, click right mouse-button and choose “resurrect page” … it then offers you couple different options.

i’ve used the addon in the past … was able to d/l many of my past webpages that i had thought were in the next solar-system. takes a bit of experimentation to understand the syntax/results.