Car will not be a daily driver, primarily for show, probably less than 1000 miles per year. Hard to believe that a rim is gonna bend that easily from aggressive driving unless you run off road or hit a curb?? I mean they are for the track which is more aggressive driving then the street?? If the wheels are custom made I am sure different types of allows can be used.
Watanabe got back to me, only 17x9 available.
Running out of sources.....