I bought mine new. I'm using front brake lines off a 95 Chevy 1500 2wd. They're super long and even have a bracket that can be moved on the line and use a self tapping screw into the uni body to hold the brake line in place.
They were maybe $9 a piece at the parts store
Also, not sure if you know, but the factory hard line can be bent straight to add to the total length.