The Sofirn SC21 Pro is on sale for less than $20
Note the listing says Anduril 1. fwiw, some are shipping w an early version of Anduril 2. In both cases I like to reflash to the latest version of Anduril 2
This is a great little light for modding. The reflector is very good, both with domed 519a, as well as dedomed. It also works very well w Red LEDs and with Nichia 219b. Plus it is compatible with a Pebbled Tir option.
stock LED:
This is far and away The Best little Anduril host I know. The built in charging, tailmagnet, and illuminated button, make it a Total Package. 