I bought these a while back:
https://www.amazon.com/gp/product/B0744C3J5W/
2 pack for $15ish. I think I selected them because they were on sale that day on Amazon. If you look around there, you'll see that there are dozens of exact replicas from various companies, it's clearly a Chinese manufacturer who sells through many routes. I don't care about that, I care than they had a Cree LED, used 18650 cells and were focus-able and waterproof. These things must weight 2 pounds, there's lots of aluminum in here.
The problem with these is that you need to buy batteries. If you run the 3xAAA then it's pretty cheap, but you'll burn through then super fast. A pair of good, brand name 18650 cells runs you $20...that's a big investment but very good batteries.