I bought some Mazda replacement keys on eBay that came without stickers. Aliexpress came through with these stickers, which are nearly identical to the OEM stickers. My only very minor nitpick is that the stickers sold in this listing are a little bit thinner (they sit just below a key fob’s outer plastic shell).

I would definitely buy these stickers again; however, I returned to this listing to learn they are no longer shipping to customers in the United States – doh! Anyway, I’m posting here to remind me should they become available again in the future.