While there isn't a single direct link to just that file in the search results, the song (composed by A.R. Rahman for the movie Kadhal Desam ) is often included in large Tamil FLAC archives. You can check these community-shared collections:

Collection of tamil FLAC - 195GB. More coming soon. : r/Chennai

: Users on r/Chennai have previously shared massive collections that typically include 90s hits like Kadhal Desam .