Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
22mm Silicone Band Strap for Xiaomi Mi Watch Color | 2.04 USD | – |
Here are coupons that you can use.
Latest price update (UTC time):
Price history and price alert
Here is price history (for all/most countries) for 22mm Band for Xiaomi Amazfit Green.
Price records source(s): Gearbest
Click on image to enlarge. 
You can set price alert (for Banggood).