Isn't there some option to explude some textures from dumping?
Anyway, some things that are used the same way as textures are not textures. EFB copies are an example of that. You can dump those, but to my knowledge there is no option to replace them the same way you can replace textures. If some actual textures on walls or similar are not dumping, i assume the issue lies somewhere else. As a last resort you could enable dumping EFB copies and see if your missing textures are in there.
Anyway, some things that are used the same way as textures are not textures. EFB copies are an example of that. You can dump those, but to my knowledge there is no option to replace them the same way you can replace textures. If some actual textures on walls or similar are not dumping, i assume the issue lies somewhere else. As a last resort you could enable dumping EFB copies and see if your missing textures are in there.