Mambo (Dreaming of 4000) (alternate mix)

Whose song is Mambo (Dreaming of 4000) (alternate mix)?

Artist Album
Electric Light Orchestra
On the Third Day
ELECTRIC LIGHT ORCHESTRA
ON THE THIRD DAY (JAPANESE LTD. EDITION PAPERSLEEVE)
On The Third Day [Bonus Tracks]
Electric Light Orchestra
The Alternate Electric Light Orchestra Album by Mike Kopka