There is a transcript of this interview here:
Kunkel comes in at 16: 41 ...
Articles on the Jungian-Christian dialogue: http://innerexplorations.com/jctext/jungian-.htm
This is a long video of Robert Johnson speaking about his life. At around 26 mins Kunkel is mentioned, and also at 36-38 mins.
"It was Fritz Kunkel who convinced me to live. I needed human faculties to see the things I treasured so much ..."