My DIY for fixing the AC leak:
Cut out the damaged portion
Build the replacement line using:
Dorman 800-632 3/8" X 12" Straight Rigid Aluminum Tubing
JEGS Performance Products 100392 -6AN Tube Sleeves
JEGS Performance Products 100382 -6AN Tube Nuts
JEGS Performance Products 100202 Flare Union
37degree flaring tool
File and sand down the Touareg aluminum tubing because it is too large for the AN6 fittings (OOOOPS!)
Fit it together and tighten the fittings
Replace the drier using Spectra Premium 0210098 A/C Accumulator. Oil those O-rings!!!
Vacuum the system
Fill her up and tighten the fittings until leaking stops but don't over torque.
Enjoy cool air from the vents =).