A nice resource has been restored to the internet. Details at Ego and at Objectivism Online, with a bit of the back story, so thanks to them for passing the word. (Yes, I'm passing the word, too, but I had nothing to do with restoring the sites or finding any of the materials) With James Sedgwick's death, his internet account was closed and his material was no longer available.
It's back up now, and I recommend that you check it out.