Missing texture woes

[Renerabbitt]

Maybe @Eric_S?
I have hundreds of missing textures. In past we were able to point to a search directory and it would find these textures by name. That method does not work any more. I could export my full library or a project and it would prompt me with missing textures and I could group select all and add a search directory and chief would find and load the missing textures as well as retroactively fix my user library. That entire wonderful function does not function any more. It never finds missing textures from a root folder that contains them all.
To my knowledge the asset manager is about as useless as it comes for missing texture files. Having to do hundreds of textures one by one is not going to work for me, and merge duplicates has no option to merge a texture of the same name where one has the texture and the other is missing..big opportunity to fix a lot of problems for me. 
What other methods can I employ to efficiently recover my missing textures?