Based on this product's specifications, here are some alternatives and similar models
Rittal SV 9666.060 enclosure cover module, polystyrol, white, single unit
Summary description:
Rittal SV 9666.060 is an enclosure cover module made of polystyrol in white colour, supplied as one piece. Designed for use with compatible electrical enclosures and panels, it provides a protective surface and touch protection where a lightweight, non-conductive cover is required. Suitable for industrial control cabinets and installation applications.