I recently lost the ball bearing that supports the turntable spindle on my HMV 101 motor model 410. I have been looking everywhere for it, but cant seem to find it

I came to the conclusion that its better if I buy a new ball bearing of the internet. Does anyone have the diamater of the ball bearing? From what i’ve heard it is a rather small ball bearing maybe not more than 1mm. I want to have the original size when putting the motor back together.
Thanks in advance