Amazon.com: 10Gtek 10Gb PCI-E NIC Network Card, Single SFP+ Port, with Intel 82599EN Controller, Ethernet LAN Adapter Support Windows Server/Linux/VMware, Compare to Intel X520-DA1(Intel E10G42BTDA) : Electronics
LR-LINK 1016PF-SFP+ 10Gb PCI-E NIC Network Card, PCI Express Ethernet Card LAN Adapter Support Windows Server/Windows/Linux/ESX Intel 82599 Chip Based - Newegg.com
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Cheap HPE P10094-B21 4 Port Network Adapter | Refurbished
StarTech.com Dual Port 10G PCIe Network Adapter Card - Intel-X550AT 10GBASE-T PCI Express 10GbE Multi Gigabit Ethernet 5 Speed NIC 2port - network adapter - PCIe 3.0 x4 - 10Gb Ethernet x 2 - ST10GPEXNDPI