Best Buy: Dr. Bott FireWire 800 to 400 Cable Adapter 7319-FWAP
Best Buy: Belkin FireWire Cable F3N404Q06-APL
FireWire 800 IEEE1394 9 Pin Male to 400 IEEE1394b 6Pin Male DV Adapter Cable 6Ft | Being Patient
Amazon.com: chenyang IEEE 1394 6Pin Female 1394a to 1394b 9Pin Beta Male Firewire 400Mbps to 800Mbps Data Video Cable 20cm : Electronics
Best Buy: LaCie FireWire 400 To FireWire 800 Flat Cable Orange 130849
6Pin 1394 to Firewire 400 IEEE 1394 4 Pin Male iLink Adapter Cord Cord 1394A | eBay
Best Buy: Rocketfish™ FireWire 800 Cable with 6-Pin Adapter Multi RF-AP312
Amazon.com: Dafensoy IEEE 1394 Firewire Cable,1394 6Pin Female to 1394b 9Pin Male Firewire,400 to 800 Cable,Suitable for Digital Camera,Printer,DV 20cm(9 Inch) : Electronics