Based on this product's specifications, here are some alternatives and similar models
Eaton NZM4-XKV110 3-Pole Extension Terminal
Summary description:
The Eaton NZM4-XKV110 is a 3-pole extension terminal designed for use with NZM4 circuit breakers. This accessory facilitates secure and reliable electrical connections in industrial power distribution systems. It is engineered for professional installation, ensuring optimal conductivity and mechanical stability within the switchgear assembly.