Any one of the shops talked about on this forum should have them available.
Ebay is a great source. Search=cummins. (oops, powerstroke)
All kinds of stuff comes up.
I have done business with "raelyn" on EBay and been happy.
Anyone know how to tell if the rotor is "Core Balanced"(As an assembly) or as individual pieces? I bought the kit for my H1, read the instructions and chickened out.