MSI ThunderboltM3 PCI-E 3.0 x4 Add-on Card for 2 x Thunderbolt 3 (USB-C) Ports Add-On Cards - Newegg.com
Adapter - Thunderbolt 3 to PCIe USB 3.1 - USB 3.0 Cards | StarTech.com
Sonnet Thunderbolt 3 Upgrade Kit for the xMac mini
Amazon.com: ASUS ThunderboltEX 3-TR Expansion Card for Z490 (Intel 10th Gen CPUs)motherboard (PCIe 3.0 x4 interface, 2 x Thunderbolt™ 3 USB Type-C® ports with 100w USB quick charge, 2 x mini DisplayPort
HP® Thunderbolt 3 PCIe 2-port I/O Card (3UU05AA) | HP® US Official Store
4 Best Thundervolt PCIe Cards in 2023
Amazon.com: StarTech.com PCIe USB 3.1 Card - 2x USB C 3.2 Gen 2 (10Gbps) - PCIe Gen 3 x4 - ASM3142 Chipset - USB Type C PCI Express Card (PEXUSB312C3) : Electronics