I've searched and haven't found what I'm looking for, so I mocked up a prototype. Before I continue further down the path, I figured I'd see if anyone has found a source for something like this...
Yes, my prototype needs some more work. It's not quite the right dimensions yet.
Amazon product ASIN B08F4VCM36
I have their glovebox divider and it’s great. Here’s a post that shows it. The plastic/ polymer they use is pretty strong! Took tin snips to break/cut it for the wiring to the GROM.