The slow-dance song in 'The Marvellon'

Slow and steady always wins the race, it's true.

Love the scene and the song. I've kept my eye open for years for information on this number but no luck. Google has been no help.

I'd love to find the complete version of the song. Does anybody know if this was a full number released into the market, or just a background music snippet produced for the episode never to surface again.