Power distribution board for KISS ESCs I designed and used in my Seeing Spark frame. This has voltage and current monitoring built in, as well as a 5V switching BEC.

Note: you should cut the enable pin off the switching regulator. It is not tolerant of high voltages

The switching regulator is a TPS560200 and the current monitor is a ZXCT1009.

You can find more information like schematic and assembly guide here and on the wiki