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This story has a happy ending.
The poster in question has responded with a legitimate reason for being incommunicado. They have also been apologetic and contributed to the customs cost. I'm gonna delete their name form the above post as I don't want others to think they are a bad trader, just mitigating circumstance in this case (but I'm gonna keep the posts up so the replies make sense and as info for others).
Just looking at his post history makes it very clear he is in the U.S. So I suspect it is indeed the Sinewave. He even references a beacon in one post. Very poor form.