Based on this product's specifications, here are some alternatives and similar models
Welding Filter Vorel E-10 50×100 mm model 74454
Summary description:
Vorel welding filter E-10 (model 74454) is a replacement filter sized 50×100 mm designed for use in welding respirators and protective masks. It provides particulate and fume filtration compatible with welding applications, helping to reduce inhalation of welding smoke and airborne particles. Suitable for maintenance and industrial welding tasks where a compact rectangular filter is required.