Because of the nature of the content and its historical association with the exploitation of minors, these "sets" are generally not hosted on mainstream platforms and are documented primarily through reports on digital safety and child protection.
Let me know if you'd like me to add anything else.
: The search results also reveal "Webe Web Corporation" was a Florida-based web hosting company that was raided by the FBI in 2005. This entity is not associated with any commercial product sets today.