https://soundiiz.com/ is so good at transferring playlists or exporting them to standard csv or playlist file. It’s $5 for one month—which is all you’ll need for this specific transfer. But I pay yearly (there’s a discount) because I like to export my playlists throughout the year. There are a bunch of other great features.

Edit: Oh, you meant the audio, too. In that case I’d say transfer/export your playlist. Then go find FLAC files of the songs from various sources.