Hi,
If you are referring to QCFS-00004S3
https://vgmdb.net/album/38397
I could only find it in mp3 format, not lossless.
https://hikarinoakariost.info/la-storia-della-arcana-famiglia-ost-music-collection/
Problem is, it was never sold separately, only as a bonus enclosure.
I already downloaded the files you posted on this site and that's not what I was looking for. (Thanks anyway)
And what is advertised for downloading there is not the ost that you see in vgmdb.net site.