In the US, Kinokuniya carries both magazines in their retail locations. They also have a rudimentary online order service, which is primarily book focused. If I remember correctly, you may not be able to purchase the magazines via the website, but if you call their phone order line, it is doable (if a bit awkward).
https://bookweb.kinokuniya.co.jp…
Retail locations:
https://bookweb.kinokuniya.co.jp…
Where can I import (or read online) Japanese magazines Men’s Ex and Leon from?
deano.com 