Based on this product's specifications, here are some alternatives and similar models
Protective welding mask glass 50x100 mm, shade E-9, No name (MAS SZK E-9)
Summary description:
Replacement protective glass for welding masks measuring 50×100 mm with a fixed shade rating E-9. Designed to fit compatible welding helmets or face shields, this glass provides eye protection from welding arc brightness and spatter. Suitable for use in MIG/MAG, TIG and MMA welding setups where an E-9 filter is required for visibility and safety during medium-intensity welding tasks.