Official (100-Pack) Maxell CD-R 80 mins XL-II Digital Audio Discs
Optical Discs for Audio | Museum of Obsolete Media
Sony (CD-R & CD-RW) | Gough's Tech Zone
Museum of Obsolete Media on X: "CD-R Audio discs were introduced in 1997 for use in standalone audio CD recorders that required these special discs since copyright levies were applied to them.