Based on this product's specifications, here are some alternatives and similar models
Internal power cable Phanteks PH-CB8P_RD 0.5 m
Summary description:
The Phanteks PH-CB8P_RD is a 0.5 m internal power cable featuring an 8-pin (4+4) EPS12V connector and an 8-pin PCI-E connector. This cable is designed to provide reliable power delivery for your components, ensuring stable performance and compatibility with various hardware setups. Its durable construction and optimal length make it an excellent choice for building or upgrading your PC.