I don't know if they still do, but regular auto parts stores used to stock them. You might try calling Napa or O'reilly's or … Also, try hondapartsnow.com. If all else fails, the auto parts store should have lengths of straight brake line available, along with fittings. You would also need a flaring tool. Use the old line for a template. Bends don't have to match exactly but do need to avoid any obstacles and be perpendicular where they connect at the ends, at the caliper and at the proportioning valve block shown in your picture. But the pre-made ones are already bent to shape and have fittings, so that's what you really want. My last time with this stuff the lines ran from $7 to about $15 each. Be sure to do a full brake bleed afterwards.