STILL LOOKING GUYS! help!
Yeah, about that.. I've found your ducksfoot ..3rd gen.. and while doing so, found me 1972 IBL columbian gold which looks identical to the shit back then too
Edit: I can not vouch for the genetics group that has it / their sales practices, etc.. but am willing to give it a shot for the `72 I think.
Edit #2: Seems that Sannie's stocks some of their beans, but not all of them. The one you want Sannie doesn't have, although they (Underground Seeds) will sell direct to you.
http://www.underseeds.com