There were two C133 in or around Anchorage, Alaska in the late 60s and early 70s. They came from the boneyard in Tucson, AZ. They hauled freight around Alaska for years, but I left and don't know what happened to them. Snoop around some of teh freight haulers left in Anchorage, and maybe they can find you a derelic.
The ORBIS people had a C-133 they used as a flying eye hospital. I think they moved on to something a little more modern, but maybe they have a lead on a source of parts.