Lost the adapter off my GM Tech II

So I go to use my Tech II the other day- and the OBDII connector is not on it! Seems I must have pulled it out of the last car I used it on, and the connector unplugged, leaving the adapter in the car, and me with just a round plug....What a bummer! I spent hours retracing my steps with no luck-- so does anybody have any links as to where I can buy just the OBDII adapter for it? Thanks ahead of time for any help you can give.