Based on this product's specifications, here are some alternatives and similar models
Power Splitter Cable StarTech.com LP4 to 2x LP4 M/F
Summary description:
The StarTech.com LP4 to 2x LP4 Power Y Splitter Cable allows you to connect two LP4 devices to a single power supply. With a length of 0.23 m, it features a Molex (4-pin) connector and two LP4 connectors. Weighing 300 g, this durable cable is ideal for expanding your power supply options in your PC setup.