Volume I
https://vgmdb.net/album/81120

and in April, comes Volume II.
https://vgmdb.net/album/81124

Have only been able to locate Vol I via Youtube, which is - in all honesty - some third-string quality.

here you go

https://hikarinoakariost.info/toaru-majutsu-no-index-iii-original-soundtrack-1/

here you go

https://hikarinoakariost.info/toaru-majutsu-no-index-iii-original-soundtrack-1/

This is only mp3. Anyone got them in FLAC?

off course he didn't say flac :)