Based on this product's specifications, here are some alternatives and similar models
Rittal 8619.790 System Chassis for VX, TS, SE, PC, IW, and AX Enclosures
Summary description:
The Rittal 8619.790 system chassis is a robust mounting accessory designed for VX, TS, SE, PC, IW, and AX enclosures. Made from high-quality stainless steel, this chassis provides reliable structural support for internal components. It features a useful width and maximum depth of 76 cm, ensuring compatibility with various rack configurations. Each pack contains 4 pieces, offering a complete solution for professional equipment installation.