If you want the entire suite in a FLAC file, yes, it already exists. It's a rip of the YouTube video, wrapped in a FLAC codec.
As I and others have explained to you though, FLAC does not guarantee quality or fidelity. It is a lossless compression format, yes, but if the original source file was already compressed and sounded like garbage, the FLAC file will also sound like garbage.
It's like you're asking for a PNG of the Mona Lisa. I can fly to the Louvre now, with an old flip phone and take a photo on that terrible camera of the Mona Lisa. I can then transfer the JPEG from that old flip phone to my desktop and then convert that awfully low quality JPEG into a PNG. I can then send you a PNG of the Mona Lisa, which is what you asked for, but it will look like my caboose after one too many leftover sandwiches.
What you actually want, as others and I have previously said, is a high quality, or high fidelity, version of the suite. Ideally an uncompressed rip from a CD, or an uncompressed bounce from Graham Smart's DAW.
You knew exactly what I meant and still wanted to behave like a contrarian…
So no, a FLAC containing (containing a lossless track) doesn’t exist.
But you do you…