" I simply can't recall, tune, timing.."

If they were in general circulation, find Google Advanced Search and enter the title plus MIDI on the first line. You may find a file of it, then you can download it, using a music program. Maybe you will find an mp3 to buy.

If you composed it yourself, just compose a new tune. You can get a device at Radio Shack or Office Depot to record it on.

If you wish to recall the old tune, study the lyrics, then turn off things that compete for the sound-processing parts of your brain. The TV, radio, etc. Have that recorder by your bedside, because the tune may pop into your head first thing in the morning.

I sometimes wake up in the morning with music in my head, or the answer to a problem.

Is 'the woman 30 years your junior' your daughter? She may remember some tunes. Enjoy the blueberries.