The trick with the Wayback Machine is to find the closest URL you can (i.e., one that is as few clicks away from the target as possible) and then redo the search. So for example you can start by looking for www.guildcompanion.com and get to the archives; if you can't get to the issue you want, you can copy the link, remove the https://web.archive.org/web/(date)/ part so you just have the original http URL, and then do a brand new search. Try multiple snapshots.
https://web.archive.org/web/20191128000308/http://www.guildcompanion.com/scrolls/2002/may/revisedweapontables.html
https://web.archive.org/web/20191128000308/http://www.guildcompanion.com/scrolls/2002/may/weapontable.xls
That said, the formatting of the examples seems like it got messed up.
And really, if you are looking for tables that resolve the issues mentioned there, I think you are better off looking at RMU which started from scratch and created full tables.