Setting Shading Model Types for Group of Materials

Just wondering if anyone out there knows a quicker/ faster way to set “unlit” for the shading model type for a huge group of materials (let’s say, 100+).
I want these to be rendered out so it cannot be a “View Mode” change in the view port.

Thanks!

with objects/actors you can use the property matrix. but it’s not available for materials.

maybe try a blutility? just taking a stab at it. might work.