Hi Stealth: 
"Have any of these other documents/correspondence been made to the public by this trial or in any other way?"
Yes. All the letters are in my copy of the transcript as Schedules and Exhibits. What I have not seen in the Transcript are the Kingdom News, copies of lectures, or copies of "The Finished Mystery" ... but I have the Finished Mystery in my personal collection. I will be reading the Exhibits again to see if perhaps the 'questionable' pages from the Finished Mystery were transcribed.The Prosecution paired down the evidence to mostly the letters of correspondence, and the Finished Mystery.