What about the rumors that Alex had a 'spare' on board? I believe there was a report that said his boat had some features that allowed access to the foils without going over the side...?

If the foils were joined in the center somehow, it might allow one to disconnect and remove the broken side and connect a new one in its place...

However, I would presume that these foils are have a unidirectional shape, so if you were to have a 'spare', you'd need both sides since you couldn't carry just one and use it in either direction?