Why is this specific FLAC work so hard to find? Because T-Series (the label) has not officially released a high-resolution (24-bit) version of the original 2005 master for streaming.
Most streaming platforms (Spotify, Apple Music, YouTube Music) offer this song, but rarely in true lossless quality for the original 2005 mix. Here is where the search becomes technical. aashiq banaya aapne 2005 flac work
Many online sources claim to offer FLAC but provide: Why is this specific FLAC work so hard to find