Find a new mechanic, one that doesn't mind doing some work. I replaced every line on my truck with non-rusting copper-nickel brake line that I bent, cut and flared the ends on myself. Really didn't take that long and I don't remember there being that many fastening points that were bolt on. Lots of clips. The toughest part was over the fuel tank.

Mine never ruptured as they were replaced before that happened. They start to look bluish when they are on the way out. If they are flaky then you are on borrowed time. That's one thing my car inspection guy is picky about is the brake lines.

As mentioned above, do have the frame checked before hand.