Thank you for the vintage parts link however same problem there with nothing available . The original extendable dipper H link # are (AT83887, AT50193 and AT77364) The non extendable dipper H link (T39046) is readily available aftermarket from broken tractor, amazon, etc.
I did find out that the extendable dipper H link is approx 1.5" wider at the dipper than the standard unit. Thanks to a very helpful user review on amazon. He had to modify the new replacement T39046 link to work and was nice enough to post pictures on his review. That is looking like what im going to have to do too.
My original has been cut, welded and butcher so many times that im thinking starting off with a better used one or a new replacement was and better idea. Not even sure if what i have on the hoe is even the original. Looking at the other links, pins and bucket on this thing.... Im thinking the pipe section they used for a bucket pin was a bad idea....