Limited quantity of FUJITSU D2755-A11 - Dual Port 10Gbp/s PCIe x8, SFP+ NICs. These are OEM Intel X520-DA2s according to our handy-dandy OEM guide here, though they do seem to have a different component layout than the Intel version, but it seems flashing them w/ the intel firmware is easily done according to the above.
There are 8 available. I bought 2 and the seller accepted $25/each. Total of 33 per card w/ shipping and tax. Seller seems to have lots of different 10 GB NICs, so might be worth following.
In case the above doesn't work out, here's a seller selling 2 @ $75 for both with free shipping:
There are 8 available. I bought 2 and the seller accepted $25/each. Total of 33 per card w/ shipping and tax. Seller seems to have lots of different 10 GB NICs, so might be worth following.

Fujitsu Dual Port 10 Gigabit Ethernet Controller Adapter - D2755A11 for sale online | eBay
Find many great new & used options and get the best deals for Fujitsu Dual Port 10 Gigabit Ethernet Controller Adapter - D2755A11 at the best online prices at eBay! Free shipping for many products!
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In case the above doesn't work out, here's a seller selling 2 @ $75 for both with free shipping:

LOT OF 2 Fujitsu D2755-A11 Dual Port 10GbE SFP+ x540 PCIe UFT-0090 Ethernet NIC | eBay
UNIT IS USE WORKING. We will not be responsible for any incompatibility issues with your unit. NOTE:SEE PIC WHAT YOU SEE WHAT YOU GET FOR MORE DETAIL.
www.ebay.com