How To Bulk-Convert Maya Materials to MaterialX in H 19?

[syntheticperson 2]

Thanks to help from hoomans on the SideFX houdini forum, I have exported a textured model from Maya 2022 to USD, then imported into Houdini 19 as a LOP network.
Unfortunately, the materials have come across with only the base color texture maps as a constant shader.
I have to replace these basic shaders with MaterialX shaders, with separate texture maps linked to base color, metalness, specular_roughness, and normal.
The attached image shows a MaterialX that I manually rebuilt and applied to to the screen-left spherical tank.
Is there a procedural way to search and replace all the basic shaders with MaterialX shaders, and re-wire all the texture maps?

Thanks