Newegg offers a selection of Kingwin adapter cables for $0 each after rebate, as listed below. Each is the best price we could find for these connectors. Deals end December 3. The items:

• Kingwin 5" 4-Pin Molex to SATA Power Adapter Cable (pictured) for $0 after $2.99 rebate + $1 s&h
• Kingwin USB 2.0 to SATA / E-SATA Adapter for $0 after $8 rebate + $1 s&h
• Kingwin 5-Foot USB to RS232 Serial Converter for $0 after $6.99 rebate + $2 s&h
• Kingwin USB Extension Cable with Intergrated Repeater for $0 after $5 rebate + $2 s&h