I'm thinking of using a self-portrait for Essential B. The one that I found in my files is from The Outsider 4/5, but I recall having seen some other self-portraits from the same period. Perhaps they're in the Unknown Bukowski Pics thread?
One could argue that many of the portraits he painted could be viewed as a self portrait. Not the one in my avatar, however. Image 120 of 128 here, for example: https://bukowski.net/paintings/