9-pin to 6-pin FireWire 800 - FireWire 400 cables 6ft.
FireWire 800 9-Pin To FireWire 400 4-Pin Bilingual Cable - 15Feet Black
Firewire 400 USB Cable 6 Pin to 4 Pin cable, IEEE-1394a, 15 foot - Newegg.com
White IEEE 1394 IEEE1394 6PIN Female to 1394b 9PIN male Firewire 400 TO 800 Adapter Cable 10cm 0.1m|ieee 1394|firewire 400 to 800firewire 400 - AliExpress
Bytecc UFE-421 Bytecc 3.5 in. USB3.0-Firewire 400-POWER e-SATA Combo Internal HUB for sale online | eBay
How to Pull Video off an Ancient TiVo or "How Many Dongles Do You Have?" - Podfeet Podcasts
Thunderbolt 3 With Firewire 400 & 800 Adapters - The Pro Tools PC
Apple Thunderbolt to FireWire Adapter - Apple
Amazon.com: Blacell USB 2.0 A Male to Firewire IEEE 1394 6P Female Adaptor Converter Connector F/M : Electronics
OWC Mercury Elite Pro FireWire, eSATA, USB3 to SATA 0GB Enclosure