20x15 is a very specific custom sizing, outside of 99.9% of vehicle fitment spectrums. So, that will require a custom built 3-piece wheel. No such thing as cheap and good quality. I'd budget around $800-1000 per wheel if you go that route.
Tony
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1969 Camaro SS Convertible | 1970 Chevelle SS 454 | 2006 Viper Coupe | 2014 Viper TA | 2014 Camaro SS 1LE
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