Buick Lesabre. Corrosion in the hydraulic line from the master cylinder
to the ABS modulator, causing a leak near the ABS modulator. The other
lines (3) going to the modulator also show corrosion in about the same
place. Replacement lines are not available from GM. Lines to the master
cylinder have a flex section crimped on, and so is not easily replaced
with tubing.
I am uncomfortable with additional couplings in the line; however I see
that it is common practice to make up brake lines by piecing together
preflared sections from the parts store.
Is it acceptable practice to "patch in" a short section at the end of a
run using a flare coupling?

Thanks

Kevin Gallimore