I hope you can the two bald guys or someone else handling them. diyparadise is 4 times the price I paid for mine a couple of years ago from 2 guys. Seems like I paid $60 for a pair of DC4s. I hope you can find some. My Ziggys work great with Bottlehead gear.
I already have a pair of my own and they are ones I got from Kent and Harry. This is for a friend who wants to build a pair. Though if I can get another pair at a reasonable price, I will. The idea of a bipolar zigmahornet keeps popping into my head and someday I'd like to try it.
the pair I bought from Kent Layden (he hand delivered them!) cost $75 two years ago - I think he was working his way through a garage full of them. But I only emailed to his twobaldguysaudio.com email address. You might be able to look him up, he was in the Cedar Hills area near Portland, OR.