Lumetri Auto White Balance?

Wondering if there is any way to make Lumetri (or use another plugin) to auto white balance continuously on a specific point throughout a clip.  I was given footage with which 2 cameras had properly locked WB and one camera was on auto WB.  This was shot is in a conference room where there is a white board and a presentation on the TV.  Whenever the TV goes to a white background, the camera white balances to it.  When there is other content on the screen the camera white balances to the whiteboard.

So totally may be out of luck, but the troublesome shot is a shot that is completely locked down, so the white board is in the exact same spot the entire shoot.

Is there possibly a way (maybe even a script or something) to have Lumetri sample the same spot and update the WB accordingly?  Probably not, a long shot I know.

Any other plugins that might help in this situation, or am I in for editing the WB manually in the these three two hour sessions...?  😕😕

Thank you all!