Brake line replacement 2003 expedition

I just had the brake line on my 2003 expedition split right under the spiral wrapped section by the drivers side front wheel. Brake pedal went flat to the floor but I was able to stop, crimp the line, and limp it home. Lines are very rusted and I should replace them all.

Has anyone undertaken this job already? I'm just starting to look into it and it seems like a job I should be able to accomplish. I think I can just rent the double flare tool at Auto Zone or Advance Auto. What size are the lines? Anyone know what fittings I need? Should I get Poly-Armour, Copper-Nickel lines, or something else?

I appreciate any advice. Thankfully this happened during nice weather with some days off coming up so I can work on it. Motorcycle works well to get me to work in the summer much better than in the winter!

If anyone knows the fitting sizes I need that would really be helpful. That's my biggest unknown and while it isn't a big deal it sure would be nice to buy them all ahead of time instead of running back and forth to the store.