Temperature sensor for AF Mammoth head

The AF Mammoth head has a M4.5mm threaded hole to, apparently, mate with either a SIP or Koso temperature sensor.
I have been searching, albeit on the small screen of my phone, for ages and I can’t find a sensor that’ll fit.
Can anyone point me in the right direction to a sensor of this size please?
By the way, I really don’t want to go with the plug attachment option.
Or, could it be that the standard CHT sensors are actually M4.5 where they screw into the plug attachment, in which case, all I’d need to do is discard the plug attachment??
I have been searching, albeit on the small screen of my phone, for ages and I can’t find a sensor that’ll fit.
Can anyone point me in the right direction to a sensor of this size please?
By the way, I really don’t want to go with the plug attachment option.
Or, could it be that the standard CHT sensors are actually M4.5 where they screw into the plug attachment, in which case, all I’d need to do is discard the plug attachment??