Based on this product's specifications, here are some alternatives and similar models
Device Adapter Rittal CB-Geräteadapter SV 9345.710 for Busbar Thickness 5, Polyamide Grey (B x H 140 x 345 mm)
Summary description:
Rittal CB-Geräteadapter SV 9345.710 is a polyamide device adapter in RAL 7035 grey designed for connection to busbars with a thickness of 5 mm. Intended for use in distribution and control enclosures, it provides a standardized mounting and cable exit solution (offer variant: 630A, 3-pole, downward cable outlet). Suitable for professional electrical installations requiring reliable mechanical support and electrical alignment.