I have been wanting to start a w123 diesel SVO car up and have had a slight amount of mechanical background. However, I wanted to check availability on parts for a 1985 300TD at my local autozone, and there was zero. Not even brake rotors, pads, nothing.

This is depressing. I just don't want to be up you know what creek without a paddle, scouring forums in order to get a certain fuel pump, or brake pad.

Is the Benz Dealer going to charge a child and a half for something like brake pads?

Are my fears unwarranted? Am I just being paranoid?