SRX-SFP-1GE-T-ET, Juniper – Extended Temperature Small Form Factor Pluggable 1000Base-T Gigabit Ethernet Module (uses Cat 5 cable)
£274.59
SFP, 1000BASE-T for Security Platforms, Cat 5e 100 meters, Extended Temperature (-40 through 85 DEGREE C), RJ-45 connector