Here are a few useful links to chastity device suppliers sites and chastity blogs I like and follow. I’ll update and verify the links regularly and will add new ones as I come across worthy additions.
Badassworkroom.com(Maker of custom and semi-custom steel chastity devices)
CB-X(Maker of the popular CB-6000 line of poly-carbonate chastity devices)
Holy Trainer(Maker of a line of resin chastity devices)
House of Denial(Olympus Collection – a collection of ergonomic, CMR-free, and infinitely wearable 3D printed male chastity devices. This new line was designed by their in-house, kink-minded team, and is available exclusively from House of Denial. New designs and colors are always on the way).
Male Chastity Now(Maker of custom and near-custom stainless steel chastity devices)
Mature Metal(Maker of the Jail Bird and other custom stainless steel devices)
Red Chili(Customized stainless steel chastity devices)