Sorry, no. The Pentax 67 standard prism eyepiece is slightly larger than the F100/HP eyepiece. And I assume the Pentax meter prism eyepiece is the same size as the non-meter prism's.
I have the Pentax TTL prism. Just now I've unscrewed the eyepiece and heading off the Sin City to bootscoot 'round the favourite haunts for a possible lens from a Nikon eyepiece. Separate communication in the last 24 hours has strongly indicated there is a known workable match with one of the Nikon lenses, if not for the F100. Which one of several if what I'm setting out to establish today.
.::Gary Rowan Higgins
A comfort zone is a wonderful place. But nothing ever grows there.