A data pack with support to custom music discs included in Angelic Discs Resource Pack
https://www.curseforge.com/minecraft/texture-packs/angelic-discs
Data pack requires Angelic Discs Resource Pack to do something.
Resource pack contains following music:
https://www.youtube.com/watch?v=iR-K2rUP86M&list=PL2U3JIUEE3zX1-yQm6A9ygyJrCLlMQjHj
They're all as separate music discs with own (poorly made) graphics (look images)
You may be required to "/reload" after each time you update datapack on a world/server
To create this I used this application:
https://github.com/TeamTernate/infinite-music-discs
