elago FireWire 400 to 800 Adapter (White) for Mac Pro, MacBook Pro, Mac Mini, iMac and All Other Computers - Walmart.com
Apple Thunderbolt to FireWire Adapter - kite+key, Rutgers Tech Store
Ieee 1394 Ieee1394 6pin Female To 1394b 9pin Male Firewire 400 To 800 Adapter Cable 10cm 0.1m - Pc Hardware Cables & Adapters - AliExpress
In an attempt to get access to content on my old MiniDV cam tapes, I attempted this long shot of an adapter hell... It's a Firewire 400 cable, to a Firewire 800