I have looked into this and have found nothing. I believe this is something that you would have to design yourself.
I was tinkering with this idea, but I am not a fabricator of any type, so making the caliper bracket was out of my league. But I believe you can use the front rotors from a mid 90's F150 4X4. You might need to turn down the O.D. of the stock hub to fit inside the rotor. I have never tried this though.