which driver here help

which is the better one out of these two ( for an S2+ triple Build 3A )

Led4power website is down, they had nice linear drivers with lots of programming options. https://led4power.com/wp-content/uploads/2017/12/LD-4-datasheet-1.1.pdf(link is external)

Kaidomain is the only option I can find: http://kaidomain.com/Flashlight-(link is external)DIY-and-Tools/Flashlight-Drivers/BD39-17mm-2200mA-3V-9V-1-cell-or-2-cells-Buck-Driver-Board

thanks .

the LD-4 are very nice, but I believe they are no longer going to be available.

If you can wait until Chinese New Year is over go have a look on the Convoy aliexoress store. Simon has many different 17mm drivers. In the meantime, there are other ali-e stores that sell 17mm drivers like this one. 8*7135 = 2.8 amps, 10*7135 = 3.5 amps.

Convoy store