Search for "power cable switch interuptor IEC" ...
Personally, I'd like an all-in-one molded plug with breaker switch that does away with the cable between the plugs and switch.
Alas, there are none that I could find, only the male-receiver switches that have to be wired up on the other side and mounted on some form of wall-like barrier...
Something like this, but with the female IEC on the other side...
JUST SAY NO TO "DONGLES"!
Something like this solid "Y" adapter, but replace one of the plugs with a switch.
Switch on top or on the side... make the centre section rotatable, so you can have the switch on whatever side you need to orient the plugs correctly and have the switch still accessible... BONUS points if it can rotate AND switch-up/down to right angles... Really, just give me one of the following with the switch also molded in...
TOO much to freq'n ask for?
Seems bloody obvious to me! Why has no one made this before?
I'm going to have to buy the plugs, a switch and a small plastic project box and tailor make one with hot-glue epoxy...