Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
TESSAN TS-301-DE-Black Cube USB Socket Power Strip | 17.11 USD | – |
 |
TESSAN TS-323 EU Wall Socket Extender with 3 AC Outlets and 3 USB Ports | 18.43 USD | – |
 |
TESSAN TS-325-DE 2300W Wall USB Socket | 22.83 USD | – |
More on Aliexpress… Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (29.43 USD): BG8OFFCOUPON
Coupon (29.43 USD): TTBLACK5
(CouponsFromChina.com tip: put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Price history and price alert
Here is price history (for all/most countries) for TESSAN TS-301-DE 6-in-1 2500W Wired Wall Socket.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).