Well, for many of them, replacing "www" with "archive" seems to work for most of them.
As for others ... it's a little more convoluted. On some, I've had to go about the following process:
1) grab the link with mouse, drag-n-drop in to search bar (not address bar)
2) this will usually produce the page I'm looking for as the top result -- click on result.
3) now you have the new valid url.
When that doesn't work, I'm lost.