Dimensions: 58.65*54.2*28.4mm (without pins), Output specifications: 5V/3A / 9V/3A / 11V/6.1A Max / 20V/3.25A Max, Input parameters: 100-240V~ /50/60Hz 1.7A, Product name: Xiaomi 67W charger set, Product model: MDY-12-ES.
Basically copy coupon, view price history or create e-mail price alert. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($52.02): BGCCARG
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGHONEY2110, 13f142, BANGGOODSD
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Xiaomi 67W Wall USB Charger MDY-12-ES is here. The lowest price was: $41.39.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).