StarTech.com Thunderbolt 3 to FireWire Adapter - External PCI Enclosure - PCIe Card plus TB3 Chassis - The Thunderbolt 3 to 1394 FireWire adapter connects your FireWire peripherals to your Thunderbolt 3
StarTech.com Thunderbolt 3 PCIe Expansion Chassis w/ DisplayPort – PCIe x16 – External PCIe Slot for Thunderbolt 3 Devices (TB31PCIEX16) - system bus extender - DP / Hayatspro
Intel Introduces Thunderbolt 4: What It Is and Does It Matter?