Kirk,
I don't know if the 5-stars (have no idea what the 'official' name is) are lighter than those other wheels. IIRC though, the original GTI 'snowflakes' are the lightest of the OEM 14x6 VW wheels. There are boatloads of them floating around, and can usually be had for $50 - $200 per set of four, depending on condition. I don't know if you're allowed to run them in SS or not. The only thing I will tell you is to stay away from the A2 16v (teardrop) wheels. They're pig-heavy and don't move much air.
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MARRS #25 ITB Rabbit GTI (sold) | MARRS #25 HProd Rabbit
SCCA 279608