Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
More on Aliexpress… Here are coupons that you can use.
Latest coupon and price update (UTC):
Price history and price alert
Price history (for all/most countries) for Xiaomi Redmi Note 4X 3/32GB Black is here.
Price records source(s): Gearbest
Click on image to enlarge.
You can set price alert (for Banggood).