Where did you look for replacements -- dealers or driver manufacturers? Do you know who manufactured the drivers? If it's someone like SEAS, for instance, you can go direct for either replacements or recommended substitutes. Unfortunately, I am not familiar with the Beta's components but I just went through this drill stocking up on spare drivers for my no-longer-in-production SW800 towers (ten drivers) and becoming familar with substitutes in the event of the ultimate disaster.
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