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The Hitchhiker’s Guide to the Galaxy has this to say about space:
Space is big. Really big. You just won’t believe how vastly hugely mindboggingly big it is. I mean you may think it’s a long way down the road to the chemist, but that’s just peanuts to space.
You might think that in a quantity of space that infinitely large you would eventually be able to find the page you were looking for. You would be wrong; it doesn’t exist. Sorry about that.
It is improbable, but possible, that the page you were looking for used to exist and now currently does not. In this case it may be even more improbably possible that the page still exists in one or more parallel universes (which, strictly speaking, are not parallel - but we digress).
The Hitch Hiker's Guide to the Galaxy has, in what we laughingly call the past, had a great deal to say on the subject of parallel universes. Very little of this is, however, at all comprehensible to anyone below the level of Advanced God, and since it is now well-established that all known gods came into existence a good three millionths of a second after the Universe began rather than, as they usually claimed, the previous week, they already have a great deal of explaining to do as it is, and are therefore not available for comment on matters of deep physics at this time.
One encouraging thing the Guide does have to say on the subject of parallel universes is that you don't stand the remotest chance of understanding it. You can therefore say "What?" and "Eh?" and even go cross-eyed and start to blither if you like without any fear of making a fool of yourself.
In theory, all you would need to do in order to find the page you are looking for is determine which parallel universe it still exists in and go there. However, given the difficulty of traveling between parallel universes and the rather high probability of ending up in one in which neither you nor the desired webpage exists, it's probably best to write off the dead link and have a nice cup of tea instead.
We apologize for the inconvenience.