Based on this product's specifications, here are some alternatives and similar models
Mounting plate for Rittal PK enclosure PK 9548.000 — grey, MPN 9548.000
Summary description:
Rittal PK 9548.000 is a grey mounting plate designed for PK-series enclosures. Supplied under MPN 9548.000, it provides a flat internal surface for fitting electrical components and assemblies inside compatible Rittal PK housings. Suitable for industrial control cabinets and equipment installations where a dedicated panel is required.