How long does it take to find a new CEO?

As long as it takes, there was never a date. You might not have noticed but since JB took over the concentrate prices continued to collapse to the extent a review of operational viability was required and is still monitored weekly, the Lithium World changed drastically as have priorities and any number of aspects related to mining.
Do you seriously think that introducing a new CEO is the main priority given the existing one knows more about mining than any likely replacement and bringing a new CEO up to speed takes months.

It could happen anytime but I'm not expecting it anytime soon, who knows what discussions are going on in the background that could affect or delay an outcome.

Cheers whisky