I believe that it is related to the amount of things being shipped at this time of the year, due to Xmas.
If it is a “priority” to get the flashlight, maybe try other sellers then (eventually local one), if they have it.
I pointed out those options at aliexpress since you mentioned it was out of stock.
You can also check banggood: link
If you opt to go to banggood, check this thread, it has discounts: Archive topic - Banggood & Fin17