Hey Indra bro, looks like you have good collection of nepali songs. I am looking for this song for a long time. I believe this song was out in the market in the same time when those songs you listed above were out (prob 10 yrs back). But I don't know the singer of this song and don't remember the lines properly.

I think it starts like this:  

फूलको आवाज, जुनको आवाज, मान्छेको आवाज ......  ए नायिका तिमी आवाज सित प्रेम गर

If you have this song with you or know more about this, plz share.