Based on this product's specifications, here are some alternatives and similar models
Mounting Adapter for GoPro Fusion to GoPro HERO System by Xrec (model SB4431)
Summary description:
Adapter by Xrec (model SB4431) designed to mount a GoPro Fusion camera to a GoPro HERO mounting system. The accessory provides mechanical compatibility between Fusion and standard HERO mounts, enabling use of existing HERO mounts, tripods and accessories. Suitable for action camera setups where mounting interchangeability is required.