Based on this product's specifications, here are some alternatives and similar models
Power Supply Unit FSP Twins PRO 500W 20+4 pin ATX PS/2 Black
Summary description:
The FSP Twins PRO 500W power supply unit features a 20+4 pin ATX connector, 80 PLUS Gold certification, and a total power output of 500W. It operates on an AC input voltage of 100-240V and frequency of 50-60Hz. Designed for server use, it includes two 4 cm fans for efficient cooling and comes with essential cables like CPU, PCIe, and SATA.