Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
Sofirn D25S SST40 Headlamp | 19.89 USD | Paste $1/15 coupon “YH648LLC777H” in the cart |
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (21.35 USD): cbrIDgTec
Coupon (21.89 USD): BG1128
Coupon (22.69 USD): BGSF
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGTORCH, BGD25SG, BGYW08
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for Sofirn D25S SST40 Headlamp.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).