TAPCO isn't a couple guys sitting behind a computer. They are a pretty well run orginazation in the biz of shipping in gun parts from all over the world- so, the Form 6 is pretty moot- and as far as shipping costs, when you are spreading it across 500 or 600 or 1000 magazines, it gets pretty minimal.
No I ment an individual buying form TOPCO vs. importind directly from overseas. I am sure that it is no problem for them to take care of the importing legalities.