You might want to reach out to Ken Williams the owner of Sans Souci, a 68' Nordhavn. He recently shipped Sans Souci from Spain to Florida with a final destination of Seattle, WA. From memory he used Sevenstar Yacht Transport for the Spain to Florida leg, not sure if he's completed the second leg from Florida to Seattle.
Here's a link to Ken's blog:
(Home) - www.kensblog.com
Here's a link to Sevenstar Yacht Transport:
Sevenstar Yacht Transport - Let The Best Ship Your Yacht