Kelsey Hayes front discs
For the KH setup I would say the hubs, spindles, and dust shields are the hardest to find. Nice to have also are the calipers, caliper hose brackets, caliper pad clips, caliper to spindle bolts, master cylinder, and the disc proportioning valve. You can still purchase calipers, pads, rotors, master cylinders, prop valves from some parts stores. I see total packages occasionally on sale here and craigslist anywhere from $200 to $900 depending on condition.
As far as the LCA’s, I would not think most people would be looking for them with a KH brake swap - I would try to sell them separately.