usb-serial ch340

For those that do not know this device it is an OBDII scanner interface. Its an inexpensive device that plugs into a vehicle under the dash near the steering wheel and allows viewing the cars built in diagnostic codes on a PC. Per below I am having trouble purchasing one with the USB interface...

Hello, I have an old Mad Catz dual force racing steering wheel with pedals that was originally made for the Playstation (PS1) I am trying to make it work with my PC. I just want to use the Pedals for flying helicopters. I do not want to use the steering wheel. The pedals have a female DB9...