https://a.co/d/34KtFpp
https://a.co/d/dnQzWfT
The exact sets i used.
The factory unions worked with S.A.E. sizes the new fittings worked with metric.
Those are on sale and a very good deal.
I've used the flare crow many times since i bought for this job.
Like you suggested, you can use them with a torque wrench, if you include a universal you can get the center over the output of the tq wrench and get an accurate reading.
Usually only the main lines between the wheel arches need replacing. It's a factory defect they crimp the lines at the bend and crack the paint. On my car the entire two lines were "made of rust" but the crossover to the right rear was fine i didn't replace.
Neiko 20657A ISO/Bubble Flaring...
https://www.amazon.com/dp/B00170V64G...p_mob_ap_share
The exact iso flare kit. Needed some tweaking but worked perfectly once cleaned up.