[Harp-L] Looking for a Charlie Musselwhite recording

[Javier Argomedo <jargomed@xxxxxxx>]

Dear friends,
Long time ago I had a tape of a live show where Charlie Musselwhite 
played during the '40 days and 40 nights' tune, I always loved that 
solo, it was even commented by the radio presenters, something like 
'that was wet!', does enybody knows were it was and how can I get it on 
CD o even better o video?
I'd appreciate any info,
cheers,
Javier.