I just looked for it, and it is indeed gone :(   What was so special about it was the way it was organized, illustrated and easy to understand.

You can go to the sites of the main originators of ERC, Charles Taylor (www.nerd3d.com) and Robert Whisenant (www.rbtwhiz.com).  All the information is there, though probably not in as user-friendly a form.  VK really boiled this stuff down and provided some very useful examples.

On the other hand, Charlie's and Rob's sites probably have more up-to-date data.  I haven't visited either in some time.  If you have MS Word you can copy the pages quickly.  There is quite a bit to read about this stuff, and a lot to digest.

John