Based on this product's specifications, here are some alternatives and similar models
Corrosion protection spray gun GAV model 66204 for cartridge applicators
Summary description:
Hand-held spray gun GAV 66204 designed for applying corrosion protection compounds from cartridge-style inserts. Compatible with cartridge applicators, it enables controlled dispensing of protective coatings for metal surfaces, joints and assemblies. Suitable for workshop and maintenance use where targeted anti-corrosion treatment and accurate application are required.