Does anyone know of a valid modern-day replacement for these? Looking for something readily available at Mouser, Digikey, etc. NTE188 (MPSU07) and NTE189 (MPSU57) are both long out of production.
I know Bob carries them for $3/4 bucks a piece, but that seems a bit much, or at least too much to order any kind of quantity on. And what to do when he runs out of the original parts?
I know Bob carries them for $3/4 bucks a piece, but that seems a bit much, or at least too much to order any kind of quantity on. And what to do when he runs out of the original parts?



