That is intriguing.
Do you have any references or URLs?
Why, yes, I do: Clive Staples Lewis, by William Griffin: Harper & Row, First Edition, 1986. page 448.
Turns out that by trying to recall it from reading it 17 years ago I had everything wrong except the main point: Lewis was the deceased, not Tolkien, and the one he visited was J.B. Phillips. Apparently it's time to reread it!
"...Chang...heard on the 1:00 p.m. BBC news that Lewis had died. In Swange, Dorset, Phillips was watching television when he saw Lewis sitting in a chair a few feet away, ruddy and grinning and glowing with health. He had seen Lewis only once before; he knew what he was seeing now. He didn't look up to the ceiling, as the bishop of Woolwich thought people did, to see if Lewis had come down through a hole. 'It's not as hard as you think, you know,' said Lewis; Phillips knew what he meant."
Incidentally, though this has nothing to do with your personal situation, but rather is simply worth noting in passing: Lewis died on 11/22/63, the day JFK was assassinated. Thus, the death of Christianity's most popular author was completely overshadowed by the most sensational single death of the 20th Century. I think I see Satan's hand there....