Paul Talks about Tap

Very old David Letterman where Paul Schaffer talks about his part in This Is Spinal Tap:

http://www.youtube.com/watch?v=0fUq44LHgUc

Replacements on Saturday Night Live

Don't know how long this one will last:
http://www.youtube.com/watch?v=b2-RJuIRAaw

If anyone knows where you can see "Kiss Me On the Bus," let me know