From Amazon
Noctua NF-A12x25 5V PWM, Premium Quiet Fan with USB Power Adaptor Cable, 4-Pin, 5V Version (120mm, Brown)
Quiet PC
Noctua NF-A12X25 PWM 5V 1900RPM 120mm Ultimate Quality Quiet Fan
Scan
Noctua NF-A12x25 5V PWM 120mm Beige/Brown Fan
3DJake
Noctua Fan 5V NF-A12x25 - PWM