General Knoppix support for those who've read the FAQ at the Wiki
SFP-10G-SR CISCO 10G SR SFP+ C-CLASS TRANSCEIVER 10 PACK
$99.00
New HP HPE Aruba J9151E 10G SFP+ LC LR 10km SMF XCVR 1310nm Module
$64.39
ProLabs 10GBase-TX SFP+ RJ-45 Copper Transceiver Module P/N: SFP-10GBASE-T-C NEW
$34.99
New Sealed Cisco GLC-LH-SMD 1000BASE-LX/LH SFP Transceiver Module *US Shipping*
$9.50
CISCO SFP-10G-LR SFP TRANSCEIVER MODULE GBIC 10G 10GB SFP - 1 Year Warranty
$39.99
IPOLEX ASF-10G-T 10GBase-T 10GbE SFP+ to RJ-45 Copper Optical Transceiver Module
$35.99
Genuine Cisco SFP-10G-SR V03 10GBASE-SR SFP+ Transceiver Module 10-2415-03
$8.00
Mellanox Original MFM1T02A-SR 10GbE 10GBASE-SR SFP+ Transceiver
$9.00
New Sealed Cisco SFP-10G-LR 10GBASE-LR SFP Plug-in GBIC Transceiver module A
$15.80
Green Label Hologram SFP-10G-T-X 10GBASE-TSFP+ Transceiver Module RJ45 30m
$69.00