Thanks for the link. At the time I purchased my linkage arms those were not available.
I will order them too when I do a next job at the front of the engine.

The thing is that linkage arms break because manifold starts to seize. It's a symptom and not the cause.
I changed my linkage arms prematurely before they fail when I cleaned my manifold.
If the linkage arms have failed then manifold needs servicing first.