Dave, there is was a genuine Laverda tool that did the job, good luck getting one now. They're just an interference fit onto the boss on the hub, the quality of the fit seems to vary quite a lot. I got mine off with a couple of little pry bars and a hot air gun. They're pretty hard so you apply reasonable force without damaging them, but applying force to as large an area as possible is still a good idea.
If the pry bars don't work, a Harbor (sic) Freight Tools bearing puller might be worth the $15.
Ken