RJ-45 Ethernet Female Socket to Terminal Spring Block Adapter : ID 4511 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
RJ45 Ethernet Splitter Cable, TSV RJ45 1 to 2 LAN Network Adapter Ethernet Splitter Cable Male to Female Fit for Cat5, Cat5e, Cat6, Cat7 LAN Ethernet Socket Connector Adapter - Walmart.com