In looking into purchasing overseas, here is some information I've obtained which might be of use to other would-be importers:
U.S. Customs: The following are the tariff numbers and duty-rates for Japanese equipment imported to the U.S. (I obtained these numbers/rates by calling the U.S. customs rate-information number, 212-466-5664, and talking to an "import specialist"):
For those considering purchasing heavy components (such as MD decks), which can be prohibitively expensive to ship by air, it might be worth considering shipping by sea (assuming you can be patient!) I obtained the following Japanese postal rates for shipping items from Tokyo to the U.S. (not including insurance) via "surface":