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 (35.99 USD): BGBFCR41
Coupon (37.26 USD): BGTORCH
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): 1dd7fb, 502C6B, linepayflt, EYBG, M4Dconvoy1
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Convoy L2 Two Cells Flashlight Shell Host.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).