Based on this product's specifications, here are some alternatives and similar models
Accessory frame for SJCam action camera, model RAMKA SJ4000 by SJCam
Summary description:
Frame accessory designed for SJCam action cameras, compatible with the RAMKA SJ4000 model. Provides a mounting and protective structure for the camera body while allowing access to buttons, screen and ports. Intended for use in photography and video recording setups where a lightweight external frame is needed for mounting on tripods, grips or rigs.