I replaced every part in my brake system except the backing plates. I purchased pre-bent stainless steel lines from In-Line tube
https://www.inlinetube.com/ . I was able to find all the brass fittings at NAPA. I was quite happy with the brake lines with the exception of my choice of selecting stainless steel lines. I had some leaking issues at the fittings. That required repeatedly tightening and loosing the fittings several times. Apparently the flare angle is slightly different on the stainless fittings. It has been in service 6 years now and no leaks after the initial install. The lines still look like new. I am happy with them but would probably not go with stainless if I did this again.
You can find a lot of info about brake line choices searching this forum.
