https://twitter.com/motorsport/status/1519585368303190020?s=21&t=WfEFUmUBhAP1TNM85TMm7A
One obvious but unlikely solution is to call on Masi, while Formula E race director Scot Elkins, who served as F1 deputy in the past, is also potentially available.
However, a more likely replacement is Herbie Blash, who served as deputy race director to Charlie Whiting until 2014.