I looked in to this earlier this year and found a couple of companies that would ship mast
or boat. I can't seem to find the information, maybe because I trashed it. I found it to be much more expensive to ship it than just lash it to the boat.
was better if the shipper could find a return customer, or if you could piggy-back with others shipping
their mast or boat, but either way it was much more expensive to ship than carry with you.
If I find the details that I got, I'll post again, otherwise I hope this helped in some way.