Amazon.com: Gavemi Molex to 4 Pin Fan Adapter for 3 Pin 4 Pin PC Case 12V Cooling Fans Molex to Fan Splitter Power Cable, 13 inch (1 Pack(1 to 4)) : Electronics
4 pin Molex to 3 pin fan – LEDGroupBuy
Amazon.com: YiKaiEn 4-Pin Molex to 3-Pin / 4 Pin Computer Fan Power Cable,Fan Speed Control Cable, 2x12V / 1x7V / 1x5V Cable (4.7'' 12cm) : Electronics