It appears that you can get tapes of C.S. Lewis talking from
C. S. LEWIS MEDIA: Audio Tapes and Videos Available from the Episcopal TV-Radio Foundation.
The following items are available directly from:
The Episcopal Radio-TV Foundation
Suite 230
3379 Peachtree Road, N. E.
Atlanta, GA 30326
1-800-229-3788 (Call for prices)
VIDEOS
* Mere C. S. Lewis - Produced by the ERTF for the International C. S. Lewis Conference, this is a biographical video of excellent quality and content.
* The Lion, the Witch, and the Wardrobe (Animated Version).
* Shadowlands - the original movie starring Joss Ackland and Claire Bloom.
* The Chronicles of Narnia (BBC/Wonderworks Videos) - Including TWW, PC, VDT, SC
AUDIOS
* The Four Loves - 4 audio cassettes, with Lewis himself describing the four kinds of love: storge, philia, eros, and agape.
* Comments and Critiques - not as well known as the previous tape, but a tremendous set of audios, with Lewis discussing Charles Williams, Pilgrims Progress, and my personal favorite, The Great Divide, which was Lewis's inaugural lecture at Cambridge. Also on these three audio cassettes is a recording of Lewis's BBC Introduction to The Great Divorce.
* C. S. Lewis: His Journey and Ours - With the Rev. Samuel T. Lloyd III and the Rev. William H. Barnwell. 5 audio cassettes. Explores Lewis's powerful understanding on the Christian faith, including his own journey as a Christian. Works discussed are: MERE CHRISTIANITY, THE SCREWTAPE LETTERS, THE GREAT DIVORCE, PERELANDRA, THE LION, THE WITCH, AND THE WARDROBE, and TILL WE HAVE FACES.
http://personal.bgsu.edu/~edwards/cslmedia.htm