Factory Disc Brake Parts to convert from Drum

I have (2) A-bodies that I want to convert from their original drum fronts to '73-'76 Disc Brake setup.

The parts that I will need to replace are the upper a-arm, and spindles. I think the lower control arm is interchangeable between the two arrangements. The calipers & rotors are no big deal, but if you have them too, I may buy the whole lot.

Let me know what you have.

Thanks,
Jay