After a little talk with jdbnsn, I've decided to gave a second live to an old mod I've done a long time ago.
First the build of the casing
Mesh on the front and top, plexi on the sides
and a 120mm at bottom
inside view from the rear
outside view from the front
Then I put the 2 PSU back to back with a plexi plate in between
And fit them inside the case, passing the wires in the holes
Add a round ccfl on the 120mm fan
and finally build the back plate for the PSU with 2 Blue leds 80mm fans
as you can see, it needed 2 wires connections, I could have put only one, splitted inside the case. But only a dual switch was needed.
The final piece with a laser cut grill to prevent for electric shocks
Inside the case: