Without the background, this is only a thought.
Why not sit down with CASA and see if you can cobble together a short term, interim, solution to keep you going ? For example, you may have multiple personnel who reasonably, together, cover the requirements ? Perhaps you can bring in a third party to assist some sort of multi-person approach ? It really should be a case of ticking off competence and independence in the checking and certifying process.
Just a thought ?