They are available on Taobao, ranging in price from over 30 to several hundred dollars. Very much to choose from. If you haven't shopped online, you can try a new way of shopping, it will be a little cumbersome at first, but later you will find it very convenient.
There is also to go to a larger drugstore or sell medical equipment place to see. You can see the real thing, but the price will be higher.
There are pros and cons.