What would "finding it" mean, whether inside the brain or out? It's quite easy to perturb consciousness by messing with the pieces of the brain, via pharmacology, injury, electrical stimulation, etc. I'm not sure why we need to assign responsibility to a single specific component like microtubules. That seems like saying the axle is responsible for a car moving. Sure, not wrong, but not right or explanatory either.

Yeah we don't even have a strict definition of consciousness.