OBD II Adapter 1 to 3, OBD2 16 Pin 1 Male to 3 Female Diagnostic Adapter Connector For Auto Repair or Car Inspection Institution - Hengye Cable Factory Store
My home-brew Arduino OBD-II connection kit - Other Hardware Development - Arduino Forum
OBD-II TTL Adapter | Famosa Studio
OBDII to UART Issues - Networking, Protocols, and Devices - Arduino Forum
Freematics OBD-II UART Adapter V1 (for Arduino)
OBD2-Shop.eu - Ptit USBTTL - FTDI USB to TTL serial adapter (without jack)