Based on this product's specifications, here are some alternatives and similar models
Rack Mount Rails PULSAR ARAS800 — 800 mm rails for ARAD enclosure
Summary description:
PULSAR ARAS800 are 800 mm rack mount rails designed for use with ARAD enclosures. These metal rails provide support and mounting points for equipment installed in a 19-inch rack or cabinet, enabling secure placement and alignment of devices. They are intended for professional rack installations where compatible ARAD chassis require 800 mm rail length.