These are TVs that are professional-grade & broadcast-grade CRTs that can be repurposed for retro gaming and support RGB.
These are the same TVs used by Square to develop Final Fantasy VII.
Watch the video to learn more about them.
https://youtu.be/RAi8AVj9GV8I think the only way to source them would be through TV networks like GMA, ABS-CBN & TV5 when they upgrade to a HD display.