When the lines started to go in my wagon, one after the other, instead of buying prebent lines or paying someone, i bought a double flare tool, pipe cutter and pipe bender. About $150 CAD, you can get much cheaper ones from harbor freight. Took about a weekend, but i replaced all the steel lines. It was absolute hell, but i can do them very quickly now, for the cost of steel line and fittings.
Stainless is cool, but factory steel lines lasted this long, they will last another 30 years no problem.