General Knoppix support for those who've read the FAQ at the Wiki
Fully Compatibility 10GBase-T Transceiver SFP-10G-T SFP+ to RJ45 Copper 30M 80M
$58.50
HP 453151-B21 453153-001 453577-001 c-Class Virtual Connect 1G SFP-SX 850nm MMF
$24.99
10 PCS Cisco GLC-LH-SMD 10-2625-01 1310nm SFP Transceiver Module
$85.00
Dell SFP 25GB SFP28-25G-SR-G2 AFBR-725TMZ-FT1 Optical Transceiver 0W4GPP
$31.50
Genuine Cisco SFP-10G-SR V03 10GBASE-SR SFP+ Transceiver Module 10-2415-03
$8.00
GENUINE Cisco SFP-10G-SR V03 SFP+ GBIC Transceiver Module 10-2415-03
$6.80
Brand New Cisco GLC-LH-SMD 1000BASE-LX/LH SFP Module 1310nm 10km SMF LC
$10.99
Cisco SFP-10G-SR SFP+ MMF 10GBase-SR 850nm Transceiver Module 1 Year Warranty
$28.49
Genuine Cisco SFP-10G-LRM SPF+ 10GB 10-2456-03 LRM Transceiver
$31.20
HP Virtual Connect FlexFabric-20/40 F8 Module 699350-001 691367-B21 + 4x 8Gb SFP
$180.00