OBD2 Connectors are various , but how to find the good obd ii connectors ,if you want to find the car scanner connectors supplier you can go to alibaba to look for the supplies .
First you can Google on the internet ,you may see the china connectors ,such as aliexpress.dhgate.vtoolshop.com and other company , you may also find the website in china who supply the car scanners , they also provide the connectors.
Let me give your a example ,
The GM Tech 2 connector :http://www.obddeal.com/obd2-16pin-connector-for-gm-tech2-p-2886.html.
The connector is very cheap so they often provide it in wholesale,usually they delivery them by ems or DHL, you can get it in one week.
Some OBDii connector images:
The OBD 2 Connector can connect the car scanner with your computer.The connector’s usb you should know well ,Popular OBD2 Connector list here:
EEPROM SOIC 8pin 8CON Cable For Tacho Universal
81 PIN ECU OBD F and DC OBD Pins
OBDIIF To PSA30 Pin
OBDIIF to Opel 10 Pin Male
BD9F To Opel 10 Pin Male Car Cables
BD9 Female to Fiat
OBD2 Female to BMW20
OBD2 Female to BENZ 38 Pin
BMW20 PIN TO Palm
Autoscanner OBDII Fault Code Reader U912 Scanner
Autocom for Truck with Full set of Cables
Autocom for Car with Full set of Cables
OBDII To BENZ Sprinter
BENZ Adapter for ACI AUTOENGINUITY Scanner
DB9 Female to OBDII-16 Pin
All the OBD ii connector are popular in china. Good connector for good cars so when you begin to choose the car connector,you should find some information about the obd ii connectors.