CR10 V4.2.2 Motherboard BLTouch using Octoprint

I am tryng to find help to get the correct firmware for my Creality cr10.
It has V4.2.2 motherboard and BLTouch bed leveling running Octoprint
I cannot locate and do not understand how to source and compile the correct firmware.
I am happy to pay for the firmware. I just need the right solution.

Hi I just put a em3d v6 hot end and used firmware builder to change max temp but I’m getting E1 max temp fail on Load up ? Machine is Ender 3 MAX I also tried both mother board options but same result.
Please help