71 K20 rear brake question

[Jthomas]

Working on getting a 71 K20 road worthy, I have gone over the brakes and realized that it is missing all the hardware for the self adjusters. I have the Eaton rear with the 12" brakes. I have not had any luck finding the parts I need, mostly the arms that go against the adjuster wheel. Does anyone know of a source for these.

I bought the truck from a friend, he has owned it since the mid 80's and as far as he knows it was never messed with. I assume all the trucks came with self adjusting rear brakes, or is it possible that it could have came without them? I guess worst case I don't have self adjusters and periodically adjust them by hand.

Here is a pic of how the brakes were when i pulled them apart, both sides looked like this. I did get a spring kit and they have different length anchor springs in it, one is shorter to go to the self adj. rod. As you can see in the pic. both of my anchor springs are the same length which makes me think it could have came from the factory like this, or someone made an effort to remove the self adjusters. Any insight or leads would be much appreciated.