itsukoii

Yes they do, they should have a section for overseas order on their website, at least they used to...

i pay my friends to go to lives to get them so that the money goes to the band. if you want to buy second-hand chekis, you can check out auction sites (mbok has more than yahoo auc), flea market apps, twitter, etc. you'll need a shopping service like FromJapan in those cases. closetchild and puresound have a more limited selection. you should also try to avoid overpaying for secondhand chekis (like those ridiculous people in the FB VK group that ask for 12-15usd for 1 cheki) unless you really really want them.

as for cheki cases, most bands that sell chekis have cheki folders as well so you can with some luck find them at the same places i mention (especially if old fans are liquidating their collection). otherwise you can find normal no-frills polaroid folders at rakuten, daiso, muji, etc.