BeltedGirls.com

I think they originally used this kind: https://plastidip.com/product/plastidip/

Badly veiled advert, and the crystal shield design is just copied from FancySteel.
As the remote controlled lock does not seem to be waterproof, possible use is quite limited in my opinion.

Still, nice to have new makers and new products.

my-steel has a V-style cable back option

For most of us chastity pervs, belts are fun and games, intended for playful power exchange or delayed sexual satisfaction. I somehow hear another tone in your question, one that ist not about fun. Do you want to protect yourself by wearing a belt? If so, I am afraid they are not good tools. If ther...