If they can build 782 cars in a year, between the factory and the dealer network, they should be able to weld in 782 brackets in less time.
Irrespective of the above - it's not a matter of time or money, it's a matter of safety.
Morgan have a duty of responsibility to advise all dealers and owners to check this area. Unfortunately it seems that, once again, they're withholding information from the owners.
It's a design fault, and all cars of this design will require modification in due course.
Better to put a program of corrective measures in place than to only react when there is a failure.