This time the samples are from HDTT - High Definition Tape Transfers. They offer some 24-bit/192KHz tracks that are encoded using lossless FLAC. Here's what they say on their website:
High Definition Tape Transfers specializes in rare classical recordings mastered with the best mastering equipment available. They are available in Redbook CD, 24/96 DVD and HQCD. We also offer our releases in 24/96 and 24/192 (on select titles) Flac downloads for playback on a High End Computer Audio System.
They have a list of 5 sample tracks available for download on their storefront. Check it out.