The Guarneri Homages feature specialist drive units that were specially designed for the speaker so I would say that any repair attempt would be fruitless. You're certainyl very unlikely to be able to buy the correct surround for the bass driver and, whilst the tweeter dome might be able to be sucked back out using the good old vacuum cleaner trick, its performance will have already been compromised. Aslo, if the damaged speaker doesn't work at all, there's no telling what other sort of internal damage has been inflicted on it.
If you really want them, I would be inclined to wait until the correct drivers are available, otherwise you'll be listening to one Guarneri Homage and one speaker that looks like a Guarneri Homage but may well possibly only sound a bit llike one!
Engineers: fixing problems you didn't know you had in ways you don't understand.