I can't speak to swapping, but modern day commercial big rigs have custom hubs made often enough. Typically it is to change wheel type to mount modern wheel on older trucks or to mount modern brakes so they can actually get parts, heh.

On that route, I would recommend getting in touch with vintage truck groups to find a reputable shop that would be interested in spinning a new set of hubs for you.

Lots of reasons cars get rebodied. These days it is most often because there is no body on the chassis, the body is too far gone, or to mount a more desirable type. Say from a sedan to convertible or coupe.

In their day, rebodies were done for similar reasons, missing, damage, or different tastes.

It is a common way to end up with an orphan car or get much the same criticism as a resto-mod or kit car does, but with none of the benefits.

Everyone flocks to the majestic dual cowl phaeton, till they see the wrong tag and everyone snubs the "imitation".

That said, there is nothing wrong with one, per se. It is a good way to get an otherwise expensive body for a lower price. Depending on when the rebody was done, why, and for whom, it could actually lend legitimacy to the car. For example, if it was done for a famous public figure early in its life, or was brought to a different coach maker and was done "properly" with documentation, etc.

In the end, like anything automotive, it comes down to what one is comfortable with.

Personally, as long as one doesn't attempt to hide its provence, I don't care. But then, I prefer the lowly sedan, so maybe I'm just not refined enough to understand, heh.