I'm in the same boat as you two, I have a 2003 Demio that is a great little car, but no one in the world seems to have heard of a custom fascia for the dashboard to allow you to install your own radio.
If I can't get this sorted (because I listen to the radio a LOT, normally) I'll end up selling this car (unfortunately) and getting something else, like a Verisa, where there IS a faceplate available to install your own radio.
Hermazda - you mention a "Eclipse" faceplate: is this a company that sells these things? Do they have a website? I would have thought they would have plenty of takers for a custom faceplate like this for a Demio.