Based on this product's specifications, here are some alternatives and similar models
Rittal SV 9674.410 busbar holder for E-Cu 100x10 mm, 3-/4-pole, grey
Summary description:
Rittal SV 9674.410 is a grey busbar holder designed for E-Cu 100x10 mm conductors, compatible with 3- and 4-pole configurations. Supplied as a single piece per pack, it secures and insulates copper busbars within electrical enclosures, facilitating reliable mounting and spacing for distribution systems and switchgear assemblies.