I just picked up a K6CH. It looked pretty rough, but it fired up and the guy helped me put it with all its heaviness into my truck. I have been looking and called the place in Lititz, PA. They have closed up. There is a power equipment dealer that has their old phone number and were kind enough to explain the situation.
A guy in England imported the Kemp machines untill Kemp closed. He is know manufacturing a near identical machine(Globeorganic.co.uk)or google globe garden master. I have tried to contact them, but they have not replied to my email.
This is the closest I could find as far as any manuals:
There is an interesting document there from WW Grinder comparing fixed and swing hammermills.