Higher Temperature

Hey out there.
I have a couple ender 3 pros one which has the sprite hot end.
I have recently replaced the heater/nozzle assembly with the high temperature version as I would like to get into some more interesting filaments and 260c just doesn’t get me there.
From what I can see there is no firmware for an ender 3 pro-BL touch 4.2.7 board that is set for 300c so I assume I need to compile it myself. I tried that tonight and it failed…not surprised as I had never done it before.
It failed on the thermistor. When i went back and looked I had used the default Thermistor. So I looked up the one listed in the description of the new parts and its a NTC100K B3950. I don’t see that specific item listed however I se various variations of it and so it’s unclear to me what to pick.
Any assistance would be appreciated.