Well, that is useful information. I have to wonder about the environment in which the vehicle was operated (salt water?) as I have not seen significant corrosion on the Goodridge items, which are plated, presumably with zinc, and passivated. The colour looks like cadmium plate, but that has been illegal for ages, and I am told that passivated zinc can be made to look similar.
The wrong kind of stainless is lethal in certain environments, including again salt water, however the right type is highly dependable. But, there may be a serious problem if the tube nuts are also stainless. They may be impossible to remove, as a problem somewhat similar in its effect to cold welding occurs between stainless parts. In a brake system you can not solve that by using the appropriate anti-seize compound, as if a trace gets into the hydraulics there will be serious seal problems within weeks.
So, quite possibly stainless hose end fittings and brass tube nuts might the the best. But I don't like brass for tube nuts as the hexagon tends to lose its corners too easily. Which brings us to stainless for the hose ends and standard plated steel for the tube nuts. Cunifer pipe of course, for safety's sake. And still a recipie for dissimilar metal electrolytic corrosion...
Suggestions?