Adapter 9-pin Sub-D female to RJ45 female - Walmart.com
Connector DB9 RS232 D-SUB Male Serial Adapter 9-pin Port Adapter to Terminal Connector Signal Module with case(Male Connector, DB9 5+5 with case A) : Electronics
COM 916: D-Sub adapter, 9-pin plug – 25-pin socket at reichelt elektronik
45-481-BU Gc Electronics, D Sub Connector Adapter, Standard D Sub, Plug | Farnell DE