Nick, if you know the precise URL of a particular page, you can see the archived copy via Google the same as I did with the index page, e.g. here's A-Begging I Will Go which I got to by putting its URL into Google and then clicking on the "Cached" link. But I'm not sure how far this will get you with MIDI files and other things that are not in some sort of HTML-like format.

Haruo