Two of the cars had the problem resolved by using the bottom half of this plastic part from new orange part attached to linkage, and reusing the top half (blue) from the original.
My problem is that before we figured that out, the original hit the shit can.
So I'm in desperate need of an original piece that looks like the above, which attaches linkage to wiper motor. It will most likely be blue, and I'm guessing that 75-77 Forgotten Bs would use the same part as the 78-79. It may also be the same on C Bdies, but is not the same as the F/M bodies, as the hole is a larger diameter. To fix the Diplomat's - the hole in the bottom clamshell of the new Orange had to be drilled out and the original top clamshell used. (Info in case you have to ever fix on a F/M).
If you have this used part in good condition to hook me up with, text me a photo to 7138997704 with how much you want to Priority Mail to Texas.