Based on this product's specifications, here are some alternatives and similar models
Anode Sourcing M8x30 Ø32 L260 for MG350
Summary description:
Sacrificial anode Sourcing designed for use with MG350 equipment. Physical identifiers include thread M8×30, outer diameter Ø32 and length L260. Provides cathodic protection by corroding preferentially to connected metal parts. Suitable for replacement and maintenance of marine or industrial systems requiring anode protection.