General Knoppix support for those who've read the FAQ at the Wiki
Lot (10) Dell 0N8TDR 850nm SFP-10G-SR-85C 10Gbs sfp+ FTLX8574D3BNL-FC N8TDR NEW
$68.00
New Sealed Cisco SFP-10G-LR 10GBASE-LR SFP Plug-in GBIC Transceiver module A
$15.80
Cisco SFP-10G-LR 10-2457-02 V02 10GBASE-LR SFP+ TRASNCEIVER
$39.00
New Sealed Cisco GLC-LH-SMD 1000BASE-LX/LH SFP Transceiver Module
$7.50
Genuine Cisco ‎SFP-10G-SR Transceiver Module (10-2415-03)
$5.85
ProLabs 10GBase-TX SFP+ RJ-45 Copper Transceiver Module P/N: SFP-10GBASE-T-C NEW
$34.99
Genuine Cisco SFP-10G-SR V03 10GBASE-SR SFP+ Transceiver Module 10-2415-03
$8.00
CISCO SFP-10G-LR SFP TRANSCEIVER MODULE GBIC 10G 10GB SFP - 1 Year Warranty
$39.99
For Cisco SFP-10G-T-X Transceiver Multi-Rate 1G/2.5G/5G/10G SFP+ to RJ-45 Module
$49.39
Cisco Nexus 96-Port 10G SFP+ Switch N9K-93128TX w/ 9K-M12PQ 12-Port 40G QSFP
$149.99