link. They've shipped TVs to the US, so they should be fine for shipping a cable, but they may even be able to find you a supplier in the USA. It's a far less common cable in the US I believe.
Thinking about it, a B&O store should be able to help you. Sign up @ BeoWorld and ask one of the US members. They should be able to help you (they have a forum area just for American members).