Piev sent me a link for a Japanese auction site with a couple of used charggers for sale:
https://www.fromjapan.co.jp/en/item/sea ... auction_lp
One is from 2010, the other is March 2015. i'm not sure of the interchange for different years, but the price seems really good compared to a new unit.
Also some helpful links about the various fees, commissions, and other expenses to expect:
https://www.ghacks.net/2014/09/22/how-t ... -japanese/\
https://buyee.jp/item/search/query/i-mi ... tionType=1
So there's no free lunch but maybe the shipping wouldn't be too outrageous?