[Slowhand] Stumble

[Bruce Wilson]

Possibly this collection has it (have not heard it myself).  Looks like a couple EC performances as well.

John Mayall - Essentially John Mayall (5 CDs - Eagle Records label)
This 5CD box set includes 4 CDs of recent material as well as 1CD of older material.
Padlock On The Blues
Along For The Ride
Stories
70th Birthday Concert
Exclusive Live Rarities (with tracks from the mid 1960s onward)

from http://www.chromeoxide.com/mayall.htm

also sound samples at http://allmusic.com/cg/amg.dll?p=amg&sql=10:fzfexqqrldke