I want to say that they do exist. I swear time and time again in the late 90's (Read 97,98,99)I have seen Shorbed dually standard cab 3500's. I either seem to think that SNET (Southern new england Telephone) had them specially made for them or they bought every one made. . . . I seem to think the first. I just am not 100% sure if they were Dodge or Chevrolet. I used to see them everywhere but when I did it was allways waay up ahead , going opposite direction ... etc. When I get home I will start searching for old SNET rigs on the truck traders ,ebays , and autoauctions.