When Ard said "I've been sitting on these hackles for the better part of 30 years and don't have a clue where I will find any more like them.", I thought I would look around and see if I could find some. So far no luck. I did come a cross a site while looking that I got a laugh out of. In the fly tying section, the guy who does the photos for the web site seems to be slacking. There are a whole bunch of 'No Photo Available". But go and look at his legging materials photo.
Fly Tying Materials & Feathers-Hook & Hackle