2002 isuzu rodeo harness

I just bought aftermarket MP3 player for my car(2002 isuzu rodeo which has factory double din cd player) and would like to install by myself. I tried many different brand wire harness which goes into car to connect without cutting car wire ,,but it won't fit. I heard that the factory radio wire harness and wire color code for 2002 isuzu rodeo has been changed,,so the aftermarket wire harness(female,into car wire) isn't in the market,yet and it should be out next year..
Is there anyone who knows where to buy the radio wire harness(into car)for 2002 isuzu rodeo? or If anyone knows new radio wire color code for 2002 isuzu rodeo please leave me a message,, thank you ,Happy new years