I think maybe Flagship Specialized might be good, they appear to have the equipment to do the job right.
I was going to recommend System Transport, they had a yacht hauling division when I was with them back a few years ago, but it looks like they may not be doing it anymore.
You can check out the site for Flagship here : Boat Transport | Yacht Transport | Sailboat Transport | Boat Transportation Company
System here: TSI
click on the System logo and get the number for the terminal there in southern California or the one in Spokane and they will help you.