Part is available but it might be tricky to replace with the alternator installed. Much easier to remove the alternator.
You will need the special tool to do the repair which will definitely make the fix a whole lot easier!
Check it out
Alternator pulley for the MK7 Golf and Golf Sportwagen with the CRUA engine code, and the 2015 Passat with the CVCA engine ...
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IMPROVED! This specialty 33 spline bit (official tool No. 3400) is supplied with a 17 mm hex body for use in your box wrench. Applications include MK-4 Golf®/Jetta®/New Beetle® alternat...
www.idparts.com