I have loads of torches. Yes quite a few companies make them in that small size, fenix wasn’t the first. Jetbeam are similar quality to fenix etc, mecarmy again similar. They all take 10180 batteries which are tiny. Astrolux M01 is another..
I needed one that really was small enough to have on a keyring and still be bright, aaa is nice but too big still (I have a thrunite ti aaa too, for pocket use which i actually use loads).
So take your pick.
You can get some of them in Ti or copper etc too.
btw code for gearbest 12% off flashlights – GB17LED brings it down to £16. I bought one few weeks ago for £12 but cant find the code I used, think it was a flash sale or sumin.
The fenix can be had from the UK but its twice the price.