I got a response today in my email from John at MRC. I was told that they are "working on" putting the instructions on the website, and that he will mail me a copy right away as well. Next day service, not too bad!
I mentioned in my original query to MRC that "Many of us at the RC forum I frequent have and use the 969, and many of us have had the upgrade service done...however, few if any of us have received the new instructions." So, an email to MRC would seem to be the ticket for anyone who needs a copy.
Ray