Hi there. I can only confirm you that you don't have big choice when it comes to teas. Tsarine, I live in Budva and I know for new tea shop next to TQ Plaza but it hasn't been opened yet. Well, at least it wasn't opened when I passed by last time. But they are preparing it. As for shop in Porto, you think of Bonela. You can try there. I always order tea from my friends coming here to bring me some. 