MSI ThunderboltM3 PCI-E 3.0 x4 Add-on Card for 2 x Thunderbolt 3 (USB-C) Ports Add-On Cards - Newegg.com
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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
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Allegro Pro USB-C 8-Port PCIe Card – Sonnet Online Store
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