I bend and double flare (must double flare, DOT requirement) all my lines myself. I like the copper nickle lines as they bend easily and NEVER work harden. They also flare like butter. I get it in coils.
You can get a brake line straightener for around $85 and up. There is a free method I use to straighten which employs tension. I do it differently than this video but you will get the idea.
