nothing wrong with universal or generic case so long as it can accommodate the amp without being far to big, plank foam is cheap and a little thought in reducing the additional room to prevent the amp from bouncing around in the case is a diy exercise in protecting your prime investment and well worth doing imho.
you've likely looked into custom fit cases and already know what they are asking for those.
i'd look and ask at both the local music store or PA equipment suppliers if they have any used cases, who cares what it looks like as long as as it's structurally sound all the latches. handles,wheels function and the size works those can be had at a more reasonable price, heck check local on line auction or sale sites you may get lucky.
you've likely looked into custom fit cases and already know what they are asking for those.
i'd look and ask at both the local music store or PA equipment suppliers if they have any used cases, who cares what it looks like as long as as it's structurally sound all the latches. handles,wheels function and the size works those can be had at a more reasonable price, heck check local on line auction or sale sites you may get lucky.