Based on this product's specifications, here are some alternatives and similar models
Reflective warning sign panel IWH 97609, rectangular 565×130 mm, compliant with ECE 70.01
Summary description:
IWH 97609 is a rectangular reflective warning sign panel sized 565×130 mm with markings compliant with ECE 70.01. Designed for mounting on trailers, agricultural vehicles or loads, it increases visibility in low light and improves road safety. The durable reflective surface provides long-term performance and easy installation for transport and roadside use.