Oh snap, friend of friend Roy Berardo just gave perms for his stuff!
He would like to be contacted on a case-by-case basis for songs, and can be reached on Discord at: Roy_Berardo #5387
Roy composed music for a new Portal mod recently, and other stuff of his can be found here:
https://soundcloud.com/roy-berardo-official
https://royberardo.bandcamp.com/