Based on this product's specifications, here are some alternatives and similar models
Bus bar Rittal SV 3515.000 — copper, set of 3
Summary description:
Rittal SV 3515.000 is a set of three copper bus bars designed for electrical distribution and busbar systems. Supplied as a pack of 3 pieces, these copper conductors are intended for use in switchgear, control cabinets and power distribution assemblies where reliable conductive connections are required.