USB-C to FireWire 800 adapter doesn't exist, make our voices heard for one. - Gearspace.com
Amazon.co.jp: Firewire Adapters: Computers
Amazon.co.jp: elago FireWire 400 to 800 Adapter for Mac [並行輸入品] : パソコン・周辺機器
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
Amazon.co.jp: JMT FireWire iLink 1.5M 4P 4Pin to 4Pin / 6Pin / USB 2.0 Male IEEE 1394 Adapter Cord Extension Cable for Mini DV Camera Camcorder (1394 4P to USB 2.0) : Computers
Apple Thunderbolt to FireWire Adapter
Black IEEE 1394 6PIN Female to 1394b 9PIN male Firewire 400 TO 800 Cable 10cm - AliExpress
Amazon.co.jp: Firewire Adapters: Computers
How to connect a firewire camera to a new Mac - Macintosh How To