It was a while before I ever did, either. At least of the double iron planes. But the problem wasn't that they weren't available, it was that I didn't know what to look for. Hopefully if nobody else other than Steve, Kees and I want to build them after this, it'll at least clue people in what to look for when they're shopping old wooden planes, and then after that, how to make the wedge if a new wedge needs to be made.
I no longer have most of the planes that I had trouble with, but the issue could've been as simple as them just needing a new wedge. The only ones that I'd conclude are poorly made right away have been the ones that have a properly set up cap iron but that clog right in the middle of the plane without cutting at the corners.