Hopefully it's only temporary. You're right, there was a heap of good info there.
I never copied the stuff there to my own machine but generally when I find sites like that I make copies of the pages just in case something like this happens.
I had a "Paintball God" moment once.
Like Al Bundy's Polk High football moment I live on
for the slim chance of repeating that one time
miracle in some small way.........