American Racing also has another option. Basically they cut the wheel to your specs.
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http://www.americanracing.com/wheel/14099/VN478 Turbine
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VNB478560XX | 15" x 6" | Blank | -19mm to 10mm | TWO-PIECE GLOSS BLACK W/ MILLED CENTER | 72.6 | 1580 lbs | $670.00 | MG478CAP2 | |
VN478560XX | 15" x 6" | Blank | -19mm to 10mm | TWO-PIECE POLISHED | 72.6 | 1580 lbs | $680.00 | MG478CAP2 |
http://www.americanracing.com/wheel/14099/VN478 Turbine