Based on this product's specifications, here are some alternatives and similar models
Power Supply Bridge Barrow GJQD-24 V2 24-pin ATX connector adapter for PSU testing
Summary description:
Barrow GJQD-24 V2 is a 24-pin ATX bridge/adapter designed for power supply testing. It provides a direct connection to standard 24-pin PC power supplies to enable bench testing, troubleshooting, or powering components without a motherboard. The compact adapter simplifies starting and measuring voltages, making PSU diagnosis and maintenance quicker and safer.