Sorry for your troubles!
Ford does not sell these wheels. A Ford dealer may, but not from/through Ford. Ford would never sell a wheel that wasn't hub centric from the factory.
Good luck getting this mess straightened out.
Not as much about rolling over as it's about structural problems, as has already been mentioned.
Go ahead and cut it out! See what happens.....report back to the forum.
Just FYI, all convertibles that have ever been produced have extra structural bracing from the factory.