StarTech.com 2-Port PCI Express Serial Card, Dual Port PCIe to RS232 (DB9) Serial Interface Card, 16C1050 UART, Standard or Low Profile Brackets, COM Retention, For Windows & Linux - PCIe to Dual
nanoFlame - IEEE-1394 FireWire controller for mini PCI Express - Advanced Micro Peripherals - PC104, miniPCIe, CompactPCI Serial, XMC, VPX - Frame Grabbers, Codecs, Video Streaming, Signal Conversion
StarTech.com 2-port 10Gbps USB C PCIe Card Adapter - USB 3.1 Gen 2 Type-C PCI Express Expansion Add-On Card - Windows, macOS, Linux - USB C PCI Express card w/ Multiple INs
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PCIe Firewire Card for ,IEEE 1394 PCI Controller 4 Ports(3 x 6 Pin and 1 x 4 Pin 4712673470153 | eBay
Delock Products 89443 Delock PCI Card > 3 x external + 1 x internal FireWire A