Noctua NA SAC1 Adapter 3-pin to 4-pin Molex - 12.5 cm [ZUAD-469] from WatercoolingUK
Amazon.com: PNGKNYOCN 4-Pin Molex to 4 x 4 Pin Fan Connector Cable (Power 4 Fans from 1 Molex Connection!) 2X12V / 2X5V for CPU PC Case Fan(2-Pack) : Electronics
Amazon.com: OPSFALCON 2 Pack 4-Pin Molex (Actual 2-Pin) to 2 x 3 Pin / 4 Pin PMW 12V PC Case Fan Power Adapter Cable, 3-Pin or 4-Pin (PWM Connector) to Molex Computer