I Wish him the best from all of us ,work is work no matter what you do ..to be able move away from it to the next chapter in your life is a great thing .
If you know enough to search for them (some keywords), try google and see if they're cached. If they are worthwhile keeping it might be worth trying this.
I copied and pasted most of his tutorials into a Word doc', so I'm OK.
I do that with most websites I visit, anything of interest I backup to a Word Doc, because some of the websites tend to disappear after a time.
For others the link Nick provided is a good suggestion.