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
2.5GBase-T PCIe Network Adapter RTL8125B 2500/1000/100Mbps PCI Express Gigabit Ethernet Card RJ45 LAN Controller Support PXE for Windows/Linux/MAC with Low Profile - Newegg.com
2.5GBase-T PCIe Network Adapter RJ45 LAN Controller up to 2500 Mbps PCI Express Gigabit Ethernet Card with Standard and Low-Profile Brackets Support Windows and Windows Server - Newegg.com
TP-Link TG-3468 PCI-Express Network Adapter (with Normal and Low Profile Bracket) - Newegg.com
Amazon.com: (Upgraded) 2.5GBase-T PCIe Network Adapter, 2500/1000/100Mbps PCI Express Gigabit Ethernet Card RJ45 LAN Controller Support Windows Server/Windows, Standard and Low-Profile Brackets Included : Electronics