It is so easy to find some sunglasses online. First, you just need to input "sunglasses online" on Google, and then you can find many websites that can provide you with all kinds of sunglasses. You can have a try. This way definitely works the best. I don't know which kind of sunglasses that you prefer to, so I can't give you more helpful suggestions. Good luck!
You don't tell us which kind of sunglasses you like best. If you just want to know more about sunglasses or only want to have a look. There are a lot of choices for you to choose. You can search sunglasses online. There are various kinds of images online. If you like some of them, you can download the images and then find a pair of the same kind of sunglasses in any local optical eyeglasses stores. Or you can find the same sunglasses in any online eyeglasses stores too. Usually the same sunglasses sold online are much cheaper than that sold in physical shops. Hope this helped!
You can have a look at http://www.firmoo.com/wrap-around-rx-sunglasses.html. There are some kinds of sunglasses. But I heard that you can choose other kind of frames and make them a pair of sunglasses too. I don't know how to make this but they can provide you with that kind of product. So if you have any interest, you can contact the customer services online or contact them through emails. They are definitely willing to help you with this.