Based on this product's specifications, here are some alternatives and similar models
Rittal RiLineX Basismodul RX L 100 mm 1 6 (9360110) — busbar distribution base module, 100 mm width
Summary description:
Rittal RiLineX Basismodul RX L is a busbar distribution base module with a 100 mm width designed for modular RiLineX systems. It serves as a mounting and connection element for busbar conductors and accessories in electrical distribution enclosures, enabling organized power distribution, easy expansion and integration of protective devices and feeders.