Amazon.com: 10Gb PCI-E NIC Network Card for Intel X550-T2, 1GbE/2.5GbE/5GbE/10GbE Copper Dual RJ45 Port, with Intel ELX550AT2 Controller, 10G PCI Express LAN Adapter Support Windows Server/Linux/ESX : Electronics
PCIE X1 RTL8125B Server Network Card 2.5GbE Multi Gigabit Network Card PCIE Gigabit Ethernet Adapter - AliExpress
Cervoz's Mini PCIe 2.5GbE Isolated Ethernet Module
Amazon.com: 10Gb PCI-E NIC Network Card for Intel X550-T2, 1GbE/2.5GbE/5GbE/10GbE Copper Dual RJ45 Port, with Intel ELX550AT2 Controller, 10G PCI Express LAN Adapter Support Windows Server/Linux/ESX : Electronics