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The entire afternoon show has been taped and is available on the bootleg "Mythology, Volume 2" although I have not heard it but I hear it's not of best quality.
I did find, however, about a minute and a half of the Essen show with an edited version of "If I Needed Someone" with George on lead vocal that someone has (what it looks like) synced with some audio on youtube. I've included the link below.
The songs for the afternoon show that are bootlegged are as follows: "Rock and Roll Music", "She's A Woman", "If I Needed Someone", "Day Tripper", "Baby's In Black", "I Feel Fine", "Yesterday", "I Wanna Be Your Man", "Nowhere Man", "Paperback Writer" and "I'm Down".
https://www.youtube.com/watch?v=pXcd0H8qpEg