Based on this product's specifications, here are some alternatives and similar models
Power Supply Unit Inter-Tech ASPOWER U1A-C20300-D 300 W
Summary description:
The Inter-Tech ASPOWER U1A-C20300-D is a reliable 300 W power supply unit designed for servers. It features a 20+4 pin ATX connector and operates on an AC input voltage of 115 - 230 V. With protection against over current, over power, over voltage, overheating, and short circuits, it ensures safe operation. The non-modular cabling and stainless steel design enhance durability. It has a mean time between failures (MTBF) of 100,000 hours and includes a 4 cm fan for cooling.