Based on this product's specifications, here are some alternatives and similar models
Power supply unit Akyga AK-B1-500, 500 W, ATX 2.31, 20+4 pin, 120 mm fan, non-modular
Summary description:
ATX power supply unit Akyga AK-B1-500 delivers 500 W total (peak 500 W) with combined +12V power 264 W and efficiency around 70%. It features a 120 mm top-mounted fan, non-modular cabling, motherboard 20+4 pin connector, one 6+2 PCIe, three SATA and two Molex connectors. Suitable for standard desktop PCs, operating 5–50 °C, MTBF 100000 h and built-in OVP/OPP protection.