Will watch with interest as to how amicably the manufacturer resolves your product repair dilemma. You have a current generation product model that may not have a valid warranty or be outside of warranty given that the warranty was not transferable and/or expired.
Notwithstanding, your current generation S5 should be made good again any which way.
Generally, manufacturers have an obligation to make good for a period up to 10 years & in many countries have a statutory obligation to carry spare parts for this time. The reality is that in recent years, this has often not been the case. A manufacturer may elect to replace new for old depending upon circumstance, eg condition, nature of fault, age etc. Great if it is an exact replacement, eg NOS. However, if it is a generational substitution, a depreciation offset factor could be applied even if within the warranty period. Nothing worse than if your flagship is replaced with a later lesser model offer. I find this practice deplorable, but it appears to be an exercisable loophole that manufacturers are taking advantage of in many regions around the world. More often than not, the replacement offer is not actually technically superior, but it is a legal out for the manufacturer upholding their product support obligation. An example of a company that does this is Samsung.
Lifetime is not your natural lifetime. How many of you have been sold the promise that loudspeakers are a lifetime investment? How many of you have been sold the promise that their loudspeaker purchase should last a lifetime if used properly? Properly means according to manufacturers recommendations which includes within specification & regular use... I have tested this claim with loudspeakers that I own which are now greater than 10 years old. I was lucky enough to get some replacement spare parts for my surrounds prior to their exhaustion which are of the same series match to my fronts, but that's it. No more support.
The reality is that if you want your uber expensive loudspeakers to last you a lifetime especially where a lifetime is expected to be greater than 10 years, be prepared to buy and carry your own spare parts stock outside of warranty...i.e. Up to a full set of crossovers and drivers. The chances are if your manufacturer is still around then (& who knows nowadays), they may not have the replacements and/or will no longer provide repair or support. They would rather steer you into buying something new.
Given the price point of the S5s, I would expect the manufacturer to extend themselves. I hope Magico also elects to buck the trend & becomes one of those timeless companies that will continue to stand by their products irrespective of vintage.