Amazon.com: Dual-Port PCIe Gigabit Ethernet Server Adapter with NetXtreme BCM5720-2P Chipset PCI Express 1000M Network LAN Card for Windows Sever Linux Ubuntu VMware : Electronics
StarTech.com Mini PCIe Card - Gigabit Ethernet Network Adapter (ST1000SMPEX)
Amazon.com: Dual-Port PCIe X4 Gigabit Network Card 1000M PCI Express Ethernet Adapter with Intel 82576 Two Ports LAN NIC Card for Support PXE SR-IOV for Windows/Windows Server/Linux/Freebsd/DOS with Low Profile : Electronics
4 Port 2.5 Gigabit Ethernet PCIe x1 Network Card NIC Realtek RTL8125 Chipset | eBay
Gigabit Ethernet PCI Express 1x Slot PCI-E Network Card 10/100 / 1000Mbps with Low Profile Bracket for Desktop PC - Newegg.com
Intel 1GB Single Port PCIe Network card (half height) | Dell USA
Amazon.com: StarTech.com 1 Port PCIe Network Card - Low Profile - RJ45 Port - Realtek RTL8111H Chipset - Ethernet Network Card - NIC Server Adapter Network Card (ST1000SPEX2L) : Electronics
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
OWC 2-Port 10G Ethernet PCIe Network Adapter... at MacSales.com