First determine if you need an ISO type flare or a standard double flare.
You can by the same size brake line tubing, determined by the inside diameter of the tubing, at any parts store. You will also need the correct sized flare nuts. You can get a tubing bender from one of those cheap tool places like Harbor Freight. It will be fine for your purposes. Then you can either rent the flaring tool from Auto Zone, or have a shop do the flares for you for a small fee.
Bend the tubing to match the original, put a nut on one end and do the proper flare. Next set the line in place and cut the other end to lenght with a tubing cutter. Put on the flare nut and do the flare. Attach the line and bleed the system in the proper sequence, that is, Right Rear, Left Front, Left Rear, Right Front. The old method of bleeding brakes from the fartherest to the closest bleeder to the master cylinder is out dated.
Duel safety diagonal brakes require the aforementioned bleeding method for best results. Each half of the master cylinder controls one front and the opposite rear brake. So bleeding the system as described (RR, LF, LR, RF)bleeds one full circuit at a time.
The old system had the brakes split front and rear, so that bleeding the rear first, and then the front, served a purpose. This is no longer true. The old way will work, but it is not recommended, nor is it the "best practice".
