In the ones I've seen, the ball or hammer can be removed. I suspect that if the whole thing were carefully foam packed it would ship fine (the OEM probably didn't hand carry them to customers

). That said, I can understand the seller's reluctance to take responsibility. And, if you take responsibility, who's to say it will be well packed?
Perhaps there's a professional packing company that could take this on. Here in the US, one would hope that if a "UPS store" did the packing that UPS would honor shipping insurance.