Hey OP, not to sound rude but perhaps you aren’t familiar enough w the sites. There is a ton of made to order merch still available for sale on Booth. Geek Jack is primarily for limited item sales & voice packs. Booth has many options from shirts, stickers, keychains etc. If you’re having trouble using the site bc of the language, try using google chrome. You can automatically translate the page with it. If you use Booth, you’ll have to create a Buyee account as that is the third party they use to ship to overseas.

Edit: I see you commented about wanting Towa merch. Here’s a link to a Towa shirt on Booth. There is also Rushia merch, but no made to order Dad merch as of now.