I'm not sure about the A3 cars, but you could get 90A alternators for the A1 VWs. And while I'm no optics expert, I always thought that lens/reflector configuration and therefore, beam pattern was more important than actual output. In other words, you can get more out of a 65w bulb w/ the right pattern than you can out of a 130w bulb w/ the wrong pattern.
I am a bit surprised by no cornering lights.
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MARRS #25 ITB Rabbit GTI (sold) | MARRS #25 HProd Rabbit
SCCA 279608