StarTech.com 3 Port 2b 1a Low Profile 1394 PCI Express FireWire Card Adapter 1394a PCIe 400 (PEX1394B3LP)

Zoro Tools

3 Port 2b 1a LP 1394 PCIe FireWire Card This 3 Port PCI Express FireWire card comes equipped with a low profile bracket for installation in small form factor PCs, and includes an optional full-size bracket for installation in a standard-sized PC case. The FireWire card can be installed in a PCIe slot to add two IEEE1394b (FireWire 800 - 9 pin) ports and one IEEE1394a (FireWire 400 - 6 pin) port, providing broad compatibility with a wide range of FireWire devices (e.g. DV camcorders, external hard drives, digital cameras, etc.). The 2x FireWire 800 and 1x FireWire 400 card features a native (single chip) PCI Express chipset, which provides faster, more reliable and cost-effective performance than expansion cards that utilize a bridge" chip."

Amazon

Add 2 native FireWire 800 ports to your low profile/small form factor computer through a PCI Express expansion slot C 3 Port PCI Express FireWire Card C PCIe FireWire Adapter Card Includes full/standard profile installation bracket 2x FireWire 800 and 1x FireWire 400 Native PCI Express chipset