Intel X520 Dual Port 10Gigabit SFP Server Adapter Ethernet PCIe Low Profile | Dell USA
Amazon.com: Dual-Port PCIe Gigabit Network Card 1000M PCI Express Ethernet Adapter with Intel 82575/82576 Two Ports LAN NIC Card for Support PXE for Windows/Windows Server/Linux/Freebsd/DOS with Low Profile : Electronics
StarTech.com 1 Port PCI Express PCIe Gigabit NIC Network Card- Low Profile - ST1000SPEX2L - Ethernet Adapters - CDW.com