Based on this product's specifications, here are some alternatives and similar models
Fan hub Singularity Fan-Node 2x4 SC-PWM-N-2x4 — PWM splitter for 2×4-pin fans
Summary description:
Singularity Fan-Node 2x4 is a compact fan hub (model SC-PWM-N-2x4) designed to split a PWM fan signal to two groups of four 4-pin fan connectors. It enables centralized PWM speed control and power distribution for multiple case or radiator fans from a single motherboard header or controller. Suitable for PC builds requiring synchronized fan management and cable tidiness.