It can be a bit tricky ordering items from E-Capcom if you don't live in Japan. Fortunately, there are a couple alternatives, especially if you're looking to import the Japan-exclusive Rockman EXE Advanced Collection "We Are Always Connected" limited edition set.
Aitai Kuji recently began accepting orders for both the Nintendo Switch and PlayStation 4 bundles, each priced at 12,00 yen (roughly $91.60 US). The E-Capcom exclusive Battle Chip keychain is included. Aitai Kuji will also carry the standalone drinking glass and coaster set.
Nin-Nin Game is another option. But at this time, both the Nintendo Switch and PlayStation 4 sets are sold out. It remains to be seen if they'll offer additional stock before April. Bookmark the page(s) and keep tabs on 'em just in case.
I've ordered from both stores before; they're good. Nin-Nin shipping can be a little hit and miss. It was really contingent on the time of year, I think. If not from these two stores, you can always try your hand at eBay or Yahoo! Japan Auctions.