I've been searching for this music track / cd on the internet and there ain't many places that seem to be selling it. The song is from a 1978 Hindi movie 'Badalte Rishtey', lead actor is jumping jack Jeetendra !
All I can is find lyrics for the song. In fact, what suprises me is that there doesn't appear to be one comprehensive online shop where I can get any and all kind of Indian music (should be searchable by music name, song name, lyrics, playback singers, music directors, year of release of movie, lead actor/actress, raga, ... ) !
Looks like a fantastic opportunity in case one has the money muscle :)
Alternately if one does of know of such a resource, please let me know.