PSA: Verbatim no longer sells real M Discs, now puts regular BD-Rs in M Disc packaging : r/DataHoarder
M-Disc 25GB White Inkjet Printable Permanent Data Archival Media Blu-ray BD-R 50 Disc Pack - Newegg.com
Wholesale 25 Pcs 4.7 Gb Printable Dvd M-discs With Storage Duration Of Up To 1000 Years. - Blank Records & Tapes - AliExpress
15 Pack M-DISC BD-R 25GB 4X HD 1000 Year Permanent Recordable Disc $74.95 852353003661 | eBay
LG WH16NS46 16X Blu-ray BDXL M-DISC DVD CD Internal Writer Drive Bundle with Free 25GB Verbatim M-Disc BD-R, CyberLink Burning Software, SATA Cable & Mounting Screws - Newegg.com