Where can I find this part? 3-speed column shifter

[King951]

Just purchased a 71' C20. Great truck but I am having a nightmare dealing with the linkages on this 3 speed column shifter. Rite now I need to buy the correct bushing as well as this specific coupling. I circled it in the image below. It has a slot that fits the rod perfectly. Any input where I can find these parts is much appreciated. Unfortunately the pick-a-part yards around here don't have many older vehicles.

Any general info or diagram or tips to deal with these linkages is much appreciated.

Thanks in advance.


https://preview.ibb.co/c5H1Vm/unnamed.png