Taylor Swift's label (Republic/UMG) does (Apple Music is AAC, Spotify is OGG). So FLAC versions usually come from:

Once you legally obtain FLACs, organize by “All Categories” as follows:

"Taylor Swift" "FLAC" pop

When searching online for these high-quality files, use these specific techniques to filter out lower-quality or illegitimate results:

Use with quotes and file type: