What do you mean by local seller? Should I contact the Japanese store directly instead of going through the proxy?

Sorry, I mean buying in your own country. It does cost more, but you are actually better off just finding one there. It is a shame, I went through a whole process of finding a proxy service which still ships them and can be bothered with the paperwork, From Japan which got renamed to One Map is the only one which did ship them:

www.fromjapan.co.jp/en

This was a year or two back, so maybe check them out?