It would be useful to know what this gadget is.
When powered from mains a simple transformer plus regulator will do fine.
Just get a separate transformer for each line.
When powered from USB you can use DC-DC boost converters to get the higher DC lines.
Without knowing what the VAC line is for it is hard to tell what get for it.
Possibly it will work fine on DC as well, possibly not.
If a square wave will do then an H bridge from the USB can make that.
An inverter could be modified by changing it's transformer or adding another transformer.
Or simply generate mains AC with an inverter and then follow the second paragraph.