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
IDE Molex 4-pin Plug Cable - 30cm long : ID 5391 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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3.5" Bay SATA and 4 Pin Molex Power Adapter
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Monoprice 24in 4pin MOLEX Male to 4x 15pin SATA II Female Power Cable with Net Jacket - Monoprice.com
Male 4 Pin Molex Crimp Connector with Housing
Amazon.com: StarTech.com 12in Molex LP4 Power Extension Cable M/F - 4 pin Molex Power Connector - 4 pin Power Extension Cable - LP4 Power Cable (LP4POWEXT12) : Electronics