Hi Mijn oude Milou
somebody with n electronics backgroud could make a rather simple 9v to 5 volt device.
But 169 euro for a simple 9 volt power-supply ?
And than the ajai is a single point of failure. If it breaks down you have nothing.
I would go for a simple narrow 6 way power socket, 5 220 => 9 volt adapters , buy six, one spare, and add a usb power adapter (1 spare) .
You will have a much cheaper, more reliable, and more flexible system. For sure you will add some new device soon, with different input voltage.
Shorten the low voltage wires to length to clean up excess wires...
one can answer me in French , je comprent..