Thanks Dave, that's a good suggestion and I've thought about it. But ultimately it's still the same wheel that they're selling that will crack at some point. Car & Driver went through 6 of 'em!
https://www.caranddriver.com/reviews/a23705281/2017-chevrolet-corvette-grand-sport-reliability/
The OEM C7 GS wheel is made by Speedline, which in the past was a high end brand and I think all were made in Italy. But the Speedlines on the C7 GS are made in Mexico, and I'd suspect a more porous production. In the end, it's a 20x12 cast alloy wrapped in a stiff 25 aspect ratio runflat, so GM should have seen it coming.