10GBase-T SFP+ to RJ45 Copper Transceiver SFP Module for Cisco SFP-10G-T-S 10Gb | eBay
Amazon.com: 100/1000BASE-T Copper SFP to RJ45 Module, Auto-Negotiation Gigabit Mini-GBIC RJ45 SFP Transceiver, Compatible for Cisco GLC-T(10/100/1000), SFP-GE-T(10/100/1000Mbps), up to 100-Meters Over Cat5e : Electronics