https://www.ebay.com/sch/i.html?_nkw=Addon+Qlogic+Qle8240+Sr+Ck+Comparable+Pcie+Nic+Network+Adapter&_sacat=0&_dmd=2

Addon Qlogic Qle8240-Sr-Ck Comparable Pcie Nic - Network Adapter

$303.00
$213.00

Network adapter - PCIe x8 - 10GBase-SR x 1