Brake line adapter

I'm not sure which fittings in the system you are talking about, but if you need the adapter fittings that are larger in size than what's standard for a certain size brake line (like say 1/4" size fitting adapter for 3/16" brake line), I found what I needed at Napa. They were just short adapter brake lines, like 6" long, with the step up or down fittings on one end of the line, typical size on the other. Only a couple bucks each. Just cut them off the line and put them on your lines as needed. They were red zinc plated instead of the typical yellow too, so makes it easier to identify them I guess. I know the mc fittings need these as well as a couple of the fittings that go into the prop valve.