Living outside of Okinawa and Japan makes it difficult to find sanshin and supplies (kunkunshi, bachi, uma, karakui, etc.) so I’m always looking for online stores that service musicians outside of Okinawa/Japan. While you may not be able to have a real snakeskin sanshin shipped outside of Okinawa/Japan, you can a synthetic one shipped to you along with the aforementioned supplies.
An online store I’ve come across is the (bear with me as it’s a long name) Sanshin Craftsmen’s Business Cooperative Association of Okinawa (online store link). A great thing about them is what their name implies: they are an online store that features instruments and items from craftsmen with workshops in and outside of Okinawa. Another great thing about them is that they’re also active on YouTube, Twitter, and other social media platforms. They also have a sanshin class via Zoom (international students are also welcome to join) the intro of which is featured above.
They respond quickly to email messages so contact them with your questions. I can confirm the quality of the items and their shipping having recently received an order from them. There are other online stores out there but it’s difficult to tell if they’re still operating and it’s definitely something you don’t want to take a chance on.
If you know of any other online stores, be sure to leave a comment and I’ll take a look.