SPT RJ45 Ethernet Cable Combiner Splitter Kit (2-Pair) 12-U1010PA-2 - The Home Depot
Amazon.com: TNP RJ45 Ethernet Cable Combiner/Splitter Kit (1 Pair), 2 Male to 1 Female & 1 Male 1 Female to 1 Female POE Data Adapter LAN Ethernet Network Extender Y Splitter Cat5e
RJ45 Cat5e 350 MHz Ethernet Network Cable – 1.5feet Blue
RJ45/RJ11 Splitter Cable Sharing Kit for Ethernet and Phone Lines – Dualcomm
Ethernet RJ45 Female Socket Push-Terminal Block : ID 2912 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits