Really Basic Switch to A/B between speakers

I see many stereo speaker selectors online... but they are all designed to be capable of running more than one set of speakers simultaneously, able to do some impedance matching, have protection circuitry etc. So their internal circuitry is more complex than what is needed for basic A/B testing. and ofcourse many of them are expensive too ($70+)

All I need is basic switching between between one or the other speaker set... and not the ability to drive both speakers. A simple switch that does not introduce additional electrical components/circuitry .. and simply passes on the signal. Would be great if it accepts banana plugs instead of bare wire.

Not able to find one like that and dont want to build one myself. Any suggestions ?