1000Mbps 4 Port Gigabit Ethernet Switches with 2 RJ45 Port 10/100/1000base-T and 2 SFP Port 1000base-T/Sx/Lx, Power Supply Optional, External - China Gigabit Switches with SFP Ports and 10-100-1000m Media Converter price
Gigabit Ethernet Switch 8-port 10/100/1000base-t To 2-port 1000base-x Media Converter Single Mode Dual Core 20km Ac Power Supply - Fiber Optic Equipment - AliExpress
Amazon.com: OLYCOM Harsh Outdoor 5-Port Gigabit Ethernet Fiber Converter, Industrial DIN-Rail Network Switch, 100/1000Base-T to LC, Up to 20KM(with SFP Transceiver), IP40, Extreme Heat -40°~ 85°C (-40°~ 185°F) : Electronics
GSD-805 8-Port 10/100/1000BASE-T Gigabit Ethernet Switch - Planet Technology USA