What's your bolt pattern? The small holes shouldn't be too bad.
But beware- Teardrops the heaviest wheels that ever came on VW Cabriolets, heavier than even steelies. I think they're like 19lbs per corner however you could score a set for less than 50 bucks.
If you can find them, Le Castellets may work.
You could always look for SSR Mk1's with high offset. The dishy ones look cool but won't do you any favors in the aero arena. They'll probably be expensive too (so will LeCastellets).
