I've just ordered 2 with shipping going to our US office (pick them up next time I'm there) using a UK credit card so a shipping redirecting service should work.

Vince, UK (2x Rio Car 20GB w/o Tuners + 3x Dell Digital Audio Receiver)
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Vince, UK RioCar 20GB + 20GB, tuner & stalk, 5 x Audio Receivers