Based on this product's specifications, here are some alternatives and similar models
Power supply unit FSP/Fortron ADVAN GM 1000W 20+4 pin ATX 80 PLUS Gold Black
Summary description:
FSP/Fortron ADVAN GM 1000W ATX power supply unit with total output 1000 W and 80 PLUS Gold efficiency. Supports 20+4 pin ATX motherboard connector; AC input 100–240 V, input current 6 A. Cable lengths: motherboard 60 cm, PCIe 70 cm. Active cooling with 120 mm fan. Compact ATX form factor (150 × 140 × 86 mm). Designed for desktop PC power delivery.