Last year I shipped a Speed Tripile from Atlanta to California and used Eagle One.
(Web Site)
The service was excellent and the best price of any I searched out at $610 incl. total insurance coverage. They will give you a quote on their web site. They only carry motorcycles and the service is door to door.
The mileage you mention is not excessive, my Triple was '02 and had 12,000. You have to have 7500 miles to qualify to bring it into California from out of state due to the lack of CA emissions certificate.
Good luck with your import!