Metric hardware in brake parts (rant)

Is anyone else sick and tired of having metric hardware put into the brake parts that are available?

I can only find wheel cylinders with 7mm (headed and threaded) bleeder screws. Others that I find online generally don't list what the thread is. I just got stainless front hoses from Dr. Diff, and while the banjo bolts have the correct thread, the head on the bolt is a freaking 15mm instead of the 5/8" that it should be. I bought from Dr. Diff instead of the other aftermarkets because I figured they cared enough to include the right stuff. I guess I was wrong. I bought a pack of tube nuts, including the 1/2-20 tube nuts that the master cylinders require. They don't use a 9/16" head like the factory ones do, NOOOOO, they chose to use a 13mm wrench size.

I'm not against metric fittings, I have full metric tool sets (and truth be told, I actually prefer them), but on a car that came with 100% SAE fasteners, why are companies putting metric fasteners in? ESPECIALLY when those fasteners have an SAE thread pitch, why would you go through the effort to put a metric head with SAE thread? All this is doing is making me have to put more and more metric tools into the trailer tool box in a car that had none of them from the factory.

Does anyone know where I can get the actual right stuff with SAE wrench sizes? It's bad enough that my throttle linkage parts came with all metric bolts, then the electric fuel pump came with metric stuff (and wire nuts, but that's another story altogether), but come on.