Brake line is leaking

[Nav13]

K so i lost most of the pressure on my brakes. I thought it was my brake master cylinder. So i replaced that but turns out its one of the lines from the bottom of my car is leaking. All four are pretty rusted to shit. But one of them is leaking. My question is how much am i looking at to fix this?

[Supa Dexta]

what car? You can make your own if you feel up to it, some old cars still have some lines available premade... Or you can hope to get one at pick and pull... Takes some time to properly loosen them off, without wrecking the fittings/ kinking the lines.

[Nav13]

94 integra gsr.