Type 26650 into Etsy's search bar, and a couple of options will come up. Might have to do a bit of scrolling. Their search bar is almost worthless. And, buyer beware! The website is run by scumbags who do literally nothing to help buyers who get scammed. Actually, they make it ridiculously easy for con-men and scammers to set up shops on Etsy! They don't care. Just as long as they get their cut on each transaction. I have a massive amount of experience on that site. The situation has gone a lot worse recently. I'd say 40% of the time, I wasn't cheated.
If you're buying something inexpensive, might be worth taking a chance on a seller. Up to you.