It looks like this project caught Klaus' attention as well, see here.
It looks like this project caught Klaus' attention as well, see here.

SFP TO RJ45 TRANSCEIVER SFP MODULE COPPER SFP OPTICAL PORT TO RJ45 ETHERNET PORT
$7.99
NEW Sealed Cisco SFP-10G-LR 10GBASE-LR SFP+ 1310nm 10km *US Shipping*
$24.00
New Sealed Cisco GLC-LH-SMD 1000BASE-LX/LH SFP Transceiver Module *US
$17.00
Dell Intel X710-DA2 5N7Y5 Dual-Port 10GbE SFP+ PCIe 3.0 x8 Network Adapter
$27.50
Genuine Cisco SFP-10G-SR 0-2415-03 10 Gigabit Transceiver
$5.40
HP 560SFP+ 10GB 2-port PCIe NIC Ethernet ADAPTER 669279-001 w/ (2) 10GB SFP+
$16.99
Intel X520-DA2 10Gb 10Gbe 10 Gigabit Network Adapter NIC Dual Port E10G42BTDA
$28.94
Cisco SFP-10G-SR-S 10g Transceivers ( 5 Pack )
$70.00
Cisco Acacia DP04QSDD-E25-840 400G QSFP-DD Coherent DCO Transceiver Module
$699.99
Penguin Computing Arctica 4806XP 48-Port 10G SFP+ 6x 40G QSFP+ Switch Dual PSU
$385.00