I've had some good luck with
www.shipgreyhound.com in shipping some of my larger amplifiers. You will need to deliver it to one of their terminals and the person reciving it will have to pick it up from the other terminal as well.
http://acoustic360.homeunix.net/images/people/nuts/john_heflin.jpg
I've also had a w123 bumper shipped to me on greyhound too, cost around $30 I think it was.